bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Austenitic Grain Growth for Heat Resisting Steel P91
Authors: Yan Xiu Ping , Jian Zhang , Ma Xu
Published: December 2012

According to the typical large-diameter thick-walled steel T/P91 (10Cr9Mo1VNb), during the hot working, there are dynamic recrystallization and grain growth. The influence of the samples at different hot treatment on the grain size and grain growth rate were obtained by the statistics of the grain size, The grain growth index under various heat treatment were compared, the mathematical model of the austenite grain growth law of P91 alloy steel was established.
Study on the Resin Curing Time and the Mechanical Properties of the Composites
Authors: Sun Jia Ying , Li Yan Qing , Tian Wei , Zhu Cheng Yan
Published: December 2012

In order to study the curing characteristics of common resins including bisphenol-A epoxy vinyl ester resin, phenolic epoxy vinyl ester resin and unsaturated polyester resin, the curing time of three resins was tested using cobalt naphthenate as accelerator and methyl ethyl ketone peroxide as curing agent. The results showed that the resin curing time reduces with the experimental temperature rising; in order to control the curing time at about 25 minutes when the experimental temperature is 23°C, the curing agent adding proportion of bisphenol-A epoxy vinyl ester resin, unsaturated polyester resin and phenolic epoxy vinyl ester resin are respective about 0.7%, 0.5% and 1.8%. The composites made by bisphenol-A epoxy vinyl ester resin have excellent tensile strength and composites made by phenolic epoxy vinyl ester resin have best bending strength.
Effects of Controlled Rolling and Controlled Cooling on the Mechanical Properties of 550MPa Grade Engineering Mechanism Steel
Authors: Xiong Tao , Xiao Yi , Wang Shi Sen , Dong Han Xiong , Li De Fa
Published: December 2012

The effects of controlled rolling and controlled cooling parameters on the microstructure and mechanical properties of 550MPa grade engineering mechanism steel were investigated in the industrial trial conditions. The results show that the mechanical properties of 550MPa grade engineering mechanism steel are obviously improved by controlling finishing rolling temperature ranged from 780°Cto 850°C, and by using accelerate cooling after rolling, ferrite grains are refined markedly of the steel which possess excellent strength and toughness behaviors.
Analysis on the Cause for Fracture Lamination of 10CrNiCu Steel
Authors: Chen Wei , Zhu Cong Mao , Yan Xiang , Liu Wu Qun , Fu Yong Tao
Published: December 2012

Based on the phenomenon of fracture lamination of 10CrNiCu steel, micro-analysis and Scanning Electron Microscope are applied, and results show that there is a lot of MnS inclusions near the fractures of 10CrNiCu steel，and the banded Structure caused by continuous cast is serious. The improve means is mentioned.
Study on Sulfur Control Technology for Non-Oriented Electrical Steel
Authors: Zeng Jian Hua , Pan Hong , Feng Yuan Chao , Zhang Min , Yang Shen Xiang , Li Li Gang
Published: December 2012

In cognizance of the problems of low desulphurization rate for hot metal, large sulfur-recovery in converter, as well as high sulfur content in products when producing non-oriented electrical steel with vanadium-content hot metal, countermeasures have been carried out. Sulfur content in non-oriented electrical steel is decreased obviously with the study on technologies of desulphurization for hot metal with vanadium & titanium, sulfur-recovery control in converter, and desulphurization in RH refining process as well. The results of industrial tests show that the rate of w（S）≤0.008 % is as high as 100 %, and the rate of w（S）≤0.005 % reaches 91.43 %. And besides, sulfur mass fraction is 0.004 2 % on average (0.001 9 %~0.006 9 %).
Effect of Two-Phase Region Quenching Temperature on Microstructure Evolution and Microhardness of HSLA100 Steel
Authors: Yan X. , Zhou G.F. , Zhu C.M. , Guan J.S.
Published: December 2012

The microstructure evolution characteristics and those effects on microhardness of HSLA (high strength low alloy) 100 steel secondary quenched in the two-phase region were investigated. The results show that the mixed microstructure of ferrite and the M-A（mastenite-austenite）islands can be obtained in the intercritical quenching region. A small amount of island structure distributing along the lath ferrite quenched at 700°C is observed by transmission electron microscope (TEM). With the quenching temperature increasing, the island structure increases in quantity and coarsens in shape, at the same time, the ferrite gradually transform from single lath morphology to polygonal shape with the dislocation density lowing. When quenched at 820°C, the microstructure reverts to lath bainite. There is a good correlation between Vickers hardness value and the volume fraction of martensite or bainite HSLA100 steel quenched in the two-phase region. The microhardness value of the steel continually increase from 240HV to 320HV quenched at the range of 700°C to 820°C, and then keep a very small fluctuation around 320HV when the temperature exceeds to 820°C.
Effects of Spray Forming and Aging Treatment on the Microstructures and Hardness of H13 Tool Steel
Authors: Zhang Jin Xiang , Wang He Bin , Lu Lin , Huang Jin Feng , Cui Hua , Zhang Ji Shan
Published: December 2012

The microstructures and hardness of spray-formed and aged H13 steel were investigated by OM, SEM, XRD and hardness tester. Compared to the as-cast H13 steel, the microstructures of the spray-formed H13 steel is characterized by lower bainite, martensite and much more retained austenite, inducing lower hardness than the as-cast H13. The peak aging temperature for the spray-formed H13 steel is 50°C higher than the commercial H13 steel (500°C) for their different microstructures. After aged at 550°C for 50h, a much higher hardness (about 53 HRC) can be retained in the spray-formed H13 steel, showing an excellent thermal stability at 550°C.
Effect of Welding Heat Cycle Peak Temperature and Heat Input on HAZ Grain Size of SMA490BW Corrosion Resistance Steel
Authors: Zhang Ming Yue , Nie Yuan , Wang Qing Ying , Chen Hui
Published: December 2012

Welding thermal cycle of SMA490BW corrosion resistance steel with different heat inputs were simulated by using Gleeble-3500 thermo-mechanical simulator to investigate the grain size of the heat affected zone (HAZ). Results show that welding heat cycle peak temperature has great influence on the grain size with the same other conditions, the higher peak temperature is the bigger grain size is; in different welding thermal cycling conditions, line energy affects grain size differently; specimens which experienced two thermal cycle have smaller grain size than which experienced just one thermal cycle.
Research on 304,321,316Lect. Stainless Steel Corrosion under the Calcinating Gas Atmosphere of Ammonium Paramolybdate
Authors: Luo Chang Sen , Luo Hong , He Xi Yang
Published: December 2012

In this paper, the corrosion behavior was researched which was happen on the 304,321,316Lect. stainless steel materials in the analogue situation of calcining gas atmosphere of ammonium paramolybdate.The oxidized etch which happened on the sample’s surface, phase constituent and element content of the fracture surface, was analyzed by the means of SEM、XRD.The results showed that the phases of Fe2(MoO4)3,MoO3,MoO2.5(OH)0.5,Cr2O3,Cr2Ti5O13, Fe2O3,Fe3O4 ect. are contained on the surfaces of the 304,316L, 321 samples which are calcined. There is an inside oxidized corrosion layer in 304 316L. The oxidizing film is damaged and the oxygen penetrates into the base to form an oxidized layer. A thin and compact oxidation film was formed between 321 corrosion layer and the alloy interface, which have prevented the base from further corrosion, under this experiment conditions, this steel belonged to the inoxidizability materials. The coating deficiency of 321 steel is shallow; the particles of oxidate is thin and without inner corrosion; the weight gain rate of oxidized etch is slow (average rate 5.2×10-2mg/ (cm2•h)), the weight gain is less and corrosion resistance is fine.
Microstructure and Properties of Powder-Forged Steel
Authors: Guo Biao , Zhang Sui Cai , Sun Chuan Shui , Ge Chang Chun
Published: December 2012

Sintered and forged powder metallurgy (P/M) steels were subjected to tensile, hardness and impact test, in order to understand the influence of the microstructure on the mechanical properties and fracture behavior. Ultimate tensile strength, yield strength, elongation, reduction in area, hardness and impact toughness all increase with a decrease in porosity. With the increase of density, the mode of fracture change from pure ductile in sintered necks of the material to complete brittle from fully dense pearlitic grains.
Test Study and Application of Corundum Slag in Slag-Forming of BOF
Authors: Chen Lu , Zeng Jian Hua , Chen Yong , Liang Xin Teng , Chen Jun
Published: December 2012

The paper introduced the process of slag-forming by using corundum slag in converter. The results showed that Al2O3 in corundum can reduce converter slag melting point, in advance of slag melting. Using this material, slagging process can be ahead of schedule for 30~40 seconds and the whole process of slag melting is good, without splashing, getting drying and lance-sticking. The consumption of metallic material and lime is reduced, and it shortens the melting period.
In Situ Production of (Fe,Cr)7C3 Particulate Bundles Reinforced Iron Matrix Composites
Authors: Tian Jing Lai , Ye Fang Xia , Zhong Li Sheng , Xu Yun Hua
Published: December 2012

In-situ production of (Fe,Cr)7C3 particulate bundles -reinforced iron matrix composite was prepared by infiltration casting between Cr wires and white cast iron at 1200°C plus subsequent heat treatment. The composites under different heat treatment times were comparatively characterized by scanning electron microscopy (SEM) and pin-on-disc wear resistance tests. The results show that the area of the particle bundles gradually increases with the heat treatment time increasing, and the chemical compositions change from eutectic to hypoeutectic, the morphologies of the reinforcements present chrysanthemum-shaped, granular and intercrystalline eutectics. Under 5 N loads, the composites appear excellent wear resistance, which is 36 times for the reference sample.
Research on Test and Parameter Identification for Nonlinear Stiffness Characteristics of Leaf Spring
Authors: Lu Yong Jie , Li Shao Hua , Wang Cui Yan , Li Shuang Yan
Published: December 2012

The leaf spring is a key component of heavy vehicle suspension. The stiffness characteristic has an important influence on vehicle ride comfort and road friendliness. Firstly, the structural features and working principle of leaf spring are introduced. Secondly the detail testing scheme of the leaf spring is proposed and the stiffness characteristics are tested through cascaded loading and unloading. The tested results show that the leaf spring has the typical features of non-linearity and hysteresis. In order to satisfy the vehicle dynamics simulation, the Fancher model is chosen to describe leaf spring nonlinear characteristics. Finally, the LSM (Least Squares Method) is utilized to identify five parameters of Fancher model based on experiment results.
A Measurement Method for Magnetic Property of the Non-Oriented Silicon Steels
Authors: Zhou Shun Bing , Feng Da Jun , Deng Zhao Jun
Published: December 2012

A measurement method for magnetic property of the non-oriented silicon steels WD23 and WD20 by X-ray diffraction (XRD) has been introduced. The measurement results show that this method is simple and the size(amount) of the required sample is small. Therefore, the method is reasonable.
Research on the Microstructure and Properties for Nb-Contained Cold-Rolling High Strength Steel Sheet
Authors: Chen Yu , Liu Xiang Dong , Wang Li Hui
Published: December 2012

The high strength high plasticity high beneficial textile cold-rolling steel with 540MPa tensile strength 27% elongation 1.67 (111) textile index is developed in industry. The experimental results show that the ferrite fine grain around 5μm supports the properties of both high strength and plasticity, while the ferrite with percentage more than 90% leads to high elongation, and the large number second precipitation phase NbC with uniform fine size around 10nm is helpful to fine ferrite grain and form strong（111）textile fiber.
Resistivity and Dielectric Measurements of Pb(Mn0.5 W0.5)O3 Ceramics with Guard Ring Electrode
Authors: Yin Maung Maung , Than Than Win , Pwint Yee Thein , Ko Ko Kyaw Soe
Published: December 2012

Polycrystalline Pb(Mn0.5W0.5)O3, PMW, a ferroelectric oxide was prepared by high temperature solid state reaction route. In order to reduce the measurement error caused by edge capacitance, laboratory-made three-terminal ring electrode (including a guard terminal) was constructed. A guard ring electrode eliminated parallel resistance paths that could cause errors in materials resistance measurements. Guard ring electrodes were useful devices which enable accurate dielectric measurements to be made on small sample of insulating material. The dielectric constant (ε′) and loss tangent (tan δ) of PMW ceramics were measured as a function of frequency ( 1 kHz- 100 kHz ). The volume resistivity and surface resistivity of PMW ceramics were also investigated. The smallest value of volume and surface resistivity were found to be 1.6 × 10-4 MΩ and 0.1281 MΩ, respectively.
Effects of Sintering Time on Structure and Properties of 0.997(KNN-LS-BF)-0.003V2O5 Lead-Free Piezoelectric Ceramics
Authors: Wang Hua , Zhai Xia , Xu Ji Wen , Yuan Chang Lai , Jinag Min Hong
Published: December 2012

0.997(KNN-LS-BF)-0.003V2O5 piezoelectric ceramics were prepared by the traditional sintering method. The effects of sintering time on structure and properties of 0.997(KNN-LS-BF)-0.003V2O5 ceramics were studied. With the increase of sintering time from 2h to 6h, the crystal phase changes from orthorhombic symmetry phase to tetragonal phase, and the properties in the piezoelectric constant d33, planar coupling coefficient kp, dielectric constant εr and dielectric loss tanδ all have been remarkably improved when the sintering time increase to 4h, then the properties of the samples would be deteriorated when the sintering time is over 4h. However, the mechanical quality factor Qm would be deteriorated all along with the increase of sintering time.
Biomorphic TiO2 Ceramics Prepared from Cotton Stalk
Authors: Wang Qing , Zhang Lin , Zhang Ya Hui
Published: December 2012

Biomorphic TiO2 was prepared by high temperature pyrolysis and a modified sol-gel route. The morphology and microstructure of TiO2 samples were characterized by scanning electron microscopy. The phase composition of the resulting sample was analyzed by X-ray diffraction. The results suggest that the biomorphic TiO2 mainly consists of rutile TiO2, and replicates the shape and part microstructure of the carbon template.
Numerical Simulation for Dynamic Recrystallization of Ti40 Alloy in Hot Compression by Finite Element Method
Authors: Song Xin , Wang Ke Lu , Zhang Xiao Bo , Lu Shi Qiang
Published: December 2012

Hot compression tests of Ti40 alloy was carried out on a GLEEBLE 3500 thermo- mechanical simulator at the deformation temperatures of 950~1100°C, the strain rates of 0.01~0.1s-1 and the height reductions from 20% to 60%. The true stress/true strain curves were obtained through the tests. Through physical experiment and FEM-based microstructure modelings, the dynamic recrystallizaiton (DRX) behavior of the alloy is extensively explored. The results show that increasing true strain, raising deformation temperature and reducing strain rate are contribute to the DRX of the Ti40 alloy. The simulation results agree well with the experiment results, which prove the accuracy of the microstructure evolution models for predicting the DRX process during hot compression.
Preparation of Cu2O (Cu)/MWCNTs Composite Particles and Their Gas Sensor Properties
Authors: Zhang Zhuan Fang , Yin Guang Ming , Yang Ying
Published: December 2012

Multiwall carbon nanotubes (MWCNTs) were embedded in cuprous oxide and copper to give ternary (Cu2O (Cu))/MWCNTs composites, Cu (CH3COO) 2•H2O and the treated MWCNTs were used as source precursor for producing composite particles by polyol method. Ethylene glycol (EG) was used as solvent and reducing agent. The products were characterized through scanning electron microscope (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The results have shown that the MWCNTs are embedded into the cuprous oxide and copper spheres homogeneously. At room temperature, the composite materials to the NOx have excellent gas sensitive response contrast to NH3, CO, H2. The concentration of NOx is 700 ppm, the maximum value of Cu2O/MWCNTs vs. the NOx gas sensor response sensitivity is 20.3 %, and gas sensor response has certain selectivity.
Parameters Affecting Dendrite Growth of Fe-C Alloy in a Forced Flow
Authors: Yuan Xun Feng , Yang Yan
Published: December 2012

The phase-field model coupling with the concentration field and flow field is used to simulate the dendrite growth during isothermal solidification of Fe-C alloy in a forced flow. The effects of noise amplitude and interface thickness on the dendrite growth are studied. The results indicate that with noise amplitude increasing, the secondary dendrite arm average space(SDAAS) on the the upstream of the lateral principal branch decreases, but the dendrite tip velocity remained about the same. With an increase in the interface thickness, the principal and secondary branch of dendrite degenerated, the equilibrium morphology of the crystal changes from developed dendrite to compact dendrite, the dendrite tip solute concentration decreases first, then increases slowly.
Study the Influences of ZnEt2 on Ethylene Chain Transfer Polymerization
Authors: Xiao An Guo , Zhou Shi Biao , Zheng Qing Yun , Shen You Ming , Zhuan Yong Bin
Published: December 2012

The influences of ZnEt2 on ethylene chain transfer polymerization were investigated in detail and the polymerization mechanism was thoroughly analyzed. The results indicated that ZnEt2 contributed greatly to increase the activity of α-diimine nickel complex/ZnEt2/MAO(MAO: methylaluminoxane). It was striking that α-diimine nickel complex/ZnEt2 catalyst system (1/100 mol/mol) exhibited 8.0 ×104g/mol∙h activity, it was possible the formation of the ion pairs of Nickel and Zinc was convenient for ethylene chain propagation, however, the ion pairs were unstable in ethylene polymerization.
The Synthesis of Novel Oligomer 4,8-Di(4-hexyl-2-thienyl)-2λ4δ2-Benzo[1,2-c;4,5-c’]bis[1,2,5]-Thiadiazole
Authors: Zhuang Xiao Xiao , Lei Xiao Long , Sun Xiao Xia
Published: December 2012

Heterocyclic oligomer based on BBT bearing solubilizing side chains have been synthesized in high yields over six steps from readily available starting materials. This approach offers a much milder, shorter, and more efficient route to BBT derivatives than current methods. This unit can then be used in the synthesis of low bandgap materials via palladium-catalyzed coupling reactions.
Laboratory Research of the Terpolymer Fracturing Fluid Gelatinizer
Authors: Zhou Cheng Yu , Jia Zheng Fu , Hou Xia Yang , Mou Xiao Ling
Published: December 2012

The terpolymer was synthesized by AM, AA and AMPS. The effects of the content of AA and AMPS, the amount of initiator, the neutralization degree, reaction temperature, reaction time and monomer concentration on terpolymer viscosities were studied. Then it draws the best conditions of this polymerization: monomer quality ratio(AM:AMPS: AA) is 10:2:1, the amount of initiator is between 0.20% and 0.25%, the neutralization degree is 90%, the reaction temperature is 30°C , the reaction time is 4 hours, the total monomer concentration is 21%. Finally, it draws a conclusion that the polymer is a kind of terpolymer which is synthesized by AM, AA and AMPS with the help of the IR spectroscopy.
Technics and Properties of Plywood Manufacture with Modified Urea-Formaldehyde Resin
Authors: Wang Xiao Mei , Li Jian Zhang , Zhang Ji Zhi , Gao Qiang
Published: December 2012

In this study, urea-formaldehyde resin was modified and used to bond three-ply plywood. The effect of hot press parameters on properties of plywood bonded by the modified urea-formaldehyde resin adhesive was investigated by an L(43) experimental design. The optimum technical parameters of hot press were obtained. Conclusions were as follows: (1) After modification, the free formaldehyde content of the urea-formaldehyde resin and the formaldehyde emission of resulting plywood were reduced by 74% and 70%, respectively; (2) The optimum technical parameters were 140°C of hot-pressing temperature, 80s/mm of hot-pressing time, 300g/m2 of glue content, and 0.8% of curing agent; (3) Under the optimum technical parameters, the bond strength and the formaldehyde emission of the plywood was 1.17MPa and 0.47mg/L, respectively.
Large-Scale Molecular Dynamics Modeling of a-SiO2
Authors: Liao Ning Bo
Published: December 2012

Silicon dioxide plays an important role in integrated circuits and microelectronics. However, the experiments have limitations in micro/nano-scale characterization of fracture properties at high temperatures. In this paper, the structural and fracture properties of amorphous silicon dioxide (a-SiO2) were studied at temperatures up to 1500K. The simulation results consist with the experiments on pair distribution functions, structure factor and angular distributions.
Effect on Polymer Chain Structure Caused by the Molar Fraction of 4-Hydroxybutyrate in Poly(3-hydroxybutyrate- co -4-hydroxybutyrate)
Authors: Li Zhi Qiang , Li Mei , Fan Wei Jia
Published: December 2012

Poly(3-hydroxybutyrate-co-4-hydroxybutyrate)copolymer [P(3HB-co-4HB)] is a kind of biodegradable high molecular polymer produced by bioaccumulation. Because of the good biodegradability and biocompatibility, P(3HB-co-4HB)s have attracted wide attention . At first, the intrinsic viscosity[η] in good solvent of P(3HB-co-4HB) s with varying contents of 4HB was investigated in different temperature. Second, observed the changes of crystallization gathered state caused by the varying contents of 4HB by polarizing microscope. The results show that to the P(3HB-co-4HB)s in same molecular weight, the intrinsic viscosity[η] in good solvent barely changes when the mole fractions of 4HB increase. On the other hand, the mean square end to end distances[0] of macromolecular flexible chains increase with the mole fractions of 4HB. At the same time, the states of aggregation change from spherulites to dendrites. In this investigation, we discuss the reasons of the differences in depth.
Wood Plastic Composites Prepared from Poly(Vinyl Chloride) and Balau Sawdust (Shorea obtusa): Mechanical Properties and N-(β-aminoethyl)-γ-aminopropyl trimethoxysilane Compatibilization
Authors: Petchwattana Nawadon , Covavisaruch Sirijutaratana , Kanawang Kamolrat
Published: December 2012

Wood plastic composites (WPC) prepared from poly(vinyl chloride) (PVC) and Balau wood particles were studied in the current research. Various particles sizes of wood flour with a top cut of 45, 75, 106, 180 and 250 µm was investigated at the range of 0-80 phr. Experimental results indicated that WPC was more stiff and brittle when the Balau wood flour was applied at all compositions. There was no statistically significant difference in the tensile strength and the elongation at break among the composites with different particle sizes. Treating the composites with silane coupling agent induced increments in both the impact strength and the tensile elongation at break.
Characteristic of the Pigments in Castanea mollissina Shell
Authors: Qi Jing Hua , Shi Yuan , Tan Feng , Wang Fang , Pang Mei Xia , Xu Yang , Yi Xin Xin
Published: December 2012

Sampled with the pigments extracted from Chinese chestnut shell by alkali solution, chromaticity with protein and starch and chromaticness and red index are related to. The characteristics were compared with that of the standard caramel pigment. Methods were used by spectrometer and colorimeter. Compared with caramel pigments, better chromaticity and stability with starch and protein, lower chromacticness and higher red index of pigments in shell were shown.
Synthesis, Properties and Application of a Photochromic Diarylethene with a Dithiolane Unit
Authors: Liu Wei Jun , Wang Hai Bo , Pu Shou Zhi
Published: December 2012

A new unsymmetrical photochromic diarylethene 1-(2-methyl-benzofuran-3-yl)-2-(2-n-butyl-5-(1,3-dithiolane)-thiophene-3-yl) perfluoroncyclopentene (1o), was synthesized and its optoelectronic properties, such as photochromism in solution as well as in poly-methylmethacrylate (PMMA) amorphous films, and the fluorescence spectra of diarylethene 1a was investigated. Using diarylethene 1c/PMMA film as recording medium and a linearly polarized 633 nm laser diode for recording and readout, polarization multiplexed image recording can be carried out in this film, which illustrated that the diarylethene can be potentially used as holographic optical recording medium.
Experimental Research on Foamed Concrete Block with High Addition Crushed Brick Powder
Authors: Wang Xue , Guo Yuan Chen
Published: December 2012

Crushed brick foamed concrete block is made of crushed brick as a main raw material and Portland cement as a cementious material, mixed with various additives, foamed by foamer and cured under the ordinary temperature and pressure condition. Studies have shown that: (1) The main chemical composition of CBP are SiO2 and Al2O3, CBP has high content vitreous body. CBP has a certain activity (2) With the increase of CBP fineness, the compressive strength of the specimen increases. (3) With the increase of the mixing amount of CBP, the compressive strength of the specimen decrease. (4) With the increase of the mixing amount of commercial caustic soda, the compressive strength of the specimen increases first then decreases.
The Adaptability Analysis of Cold Regenerated Structure Layer
Authors: Wang Yong Bing , Ying Guo Qiang , Hu Jian Lin , Wei Hua Wei , Zhang Qian
Published: December 2012

The quality of the base layer materials is one of the key factors that influences pavement performance and service life. The previous research and experiment results have preliminarily proved that cool regenerated materials have good road-applied properties, and verified the main technical characteristics of preliminary analysis results of cement cold regenerated. Based on experimental results and cement strength standard, road performance cold regenerated aggregates and cold regenerated lime treated soil is analyzed in this paper. The results show that the performance of cement cold regenerated materials meets the requirements. Cement cold regenerated aggregates can be used as Grade 2nd and below Grade 2nd road. Under appropriate conditions, cement cold regenerated aggregates can also be used for freeway base; Cement cold regenerated lime treated soil can be used as subbase Grade 2nd and Grade 2nd below road.
Optimum Mixture Ratio of Cement and Red Mud Stabilized Graded Crushed Stones Based on Grey Situation Decision
Authors: Liang Xu , Yu Wei
Published: December 2012

Red mud used in cement stabilized macadam, can be used as cementing materials and auxiliary cementation of cement, and be regard as fine aggregate, which has dual role. Aiming at optimum content of red mud which used in the cement stabilized macadam road base, the grey system theory was used and a new grey situation decision model was established. In this model, variation coefficient was used to decide index weighting. Based on the model for optimum mixture ratio of cement and red mud stabilized graded crushed stone, the calculation of the conclusion is consistent with the actual engineering, which shows that grey situation decision-making is the effective method of optimum content of red mud optimization.
Application of Advanced Materials in Sports Engineering
Authors: Cai Yun Tao , Song Zhi Qiang
Published: December 2012

The applications of advanced materials in the sports Engineering are the long-term needs of sports development. The roles of the advanced materials played to improve relations between the level of science and technology and the sports Engineering are elaborated, the applications of the new materials at home and abroad are introduced in the paper, pointing out that the development of sports needs people to explore and use new materials, and the research and application of new materials have great significance on the development of sports.
Automatic Identification of Crack in Ultrasonic Infrared Imaging
Authors: Feng Fu Zhou , Zhang Chao Sheng , Min Qing Xu , Jiang Peng Cheng
Published: December 2012

Ultrasonic Infrared Imaging is a novel NDE technique, which performs well on material internal defect detection, such as metal fatigue crack, composite material impact damage and adhesion and so on. Traditional defect identification often depends on eyes and professional experience, which can’t give a clear conclusion of defect information. The identification algorithm based on time sequence images is low-level. Therefore, taking the crack detection in Ultrasonic IR Imaging as an example, after contrastive analysis of shape characters and gray distribution between crack region and normal region, characteristic parameters for different regions was creatively extracted in this paper. An automatic recognition algorithm based on Weighted Support Vector Machines is put forward for crack recognition. Subsequently, the correctness of the algorithm was validated by experiments.
Research on the Utilization of Smart Meters’ Information under the Background of Smart Grid
Authors: Guo Hao Chi , Niu Dong Xiao , Liu Jin Peng , Ma Zhen
Published: December 2012

Smart meters are developed gradually from the traditional power meters, which is an important terminal in the smart grid. It is the foundation of information integration, analysis, optimization and information expression, and undertakes the task to data acquisition, measurement and transmission. This paper reviews the development and application of smart meters, analysis the technical requirements, function of smart meter, and summarizes the benefit of smart meters’ application. It can be concluded that the large-scale use of smart meters will fully reflected energy conservation, efficiency, and safety of the smart grid.
A Sinusoidal Grating Design and Performance Analysis
Authors: Zhou Bo , Liu Zhong Yan , Rao Long
Published: December 2012

Obtain 3-D profilometry of object by phase in optics 3-D techniques, need to project sinusoidal grating on the surface of object measured. To improve the contrast intensity of projection sinusoidal pattern, introduce pulse-width modulation method of electrical engineering to design sinusoidal grating. Firstly, analyze the feasibility of designing sinusoidal grating using high frequency triangular waveforms modulating sinusoidal waveform. Describe light intensity distribution function of 3-D measurement. Give instantiation of creating sinusoidal grating. Finally, analyze frequency spectrum performance for the sinusoidal grating.
Method of Dynamic Detection for Clutch of Real Vehicle Based on RFID Technology
Authors: Yu Li Hui , Wang Li Rong
Published: December 2012

In this paper, we discussed a method of dynamic detection for clutch of real vehicle based on RFID technology. Clutch is a key component in vehicle. It ensures smooth start and shift and prevents overload of transmission system. Traditional detection method is to measure on a simulated working table. But the combining process of start and shift in bad condition can bring other troubles which lead to possible damage and reduce the service life of clutch. So, it is very important to detect Clutch of real vehicle in real time. Firstly, we discussed clutch of real vehicle important parameter. Secondly, a wireless transmission method is provided by RFID. Finally, a simulation results is given.
Research and Application of Portable Real Protection Potential Measurement System of Buried Steel Pipeline
Authors: Zhao Xue Fen
Published: December 2012

The measurement of pipeline to ground potential is the most common method to evaluate protection condition of buried pipeline. For the old pipeline, pipeline to ground potential measured with surface reference electrode method or reference electrode method close to pipeline usually is not the real protection potential of buried pipeline due to presence of an IR drop and/or stray current interference. A portable real protection potential measurement system combining the polarized probe with the portable surface data acquisition unit is developed, the polarized probe can measure the real protection potential by eliminating IR drop and/or stray current interference, meanwhile portable surface data acquisition unit can automatically record protection potential. The on-site application of the system show that the system can quickly and accurately measure the protective potential of buried pipeline, reduce human measurement error, and really reflect the cathodic protection condition of pipeline.
The Analysis of the Fly Shear Head Motion Track
Authors: Shi Jia Lian , Zhu Chang Qi , Zhao Ming
Published: December 2012

Study the equation of motion of cut head on flying head, and get the trajectory curve.According to the analysis about trajectory curve,build a baffle on the bell mouth behind the guide groove of flying shear , and determine the position of the baffle, solve the problem that steel head often inserting into the guide groove behind flying shear, which affect the process of steel inserting into the following mill group, and even cause run steel accident.
Research on Influence of Intertooth Space Confriction to Transmission Efficiency under EHL
Authors: Liang Wen Hong , Liu Kai , Liu Xiao Lin , Cui Ya Hui
Published: December 2012

Engagement between gear teeth with confriction has been analyzed aim at low speed and heavy transmission mode of spur gear in aerogenerator gearbox. Nonlinear relation between parameters such as confriction, normal pressure, number of teeth, ratio of transmission, and thickness of fluid film has been deduced by using the theory of elasto-hydrodynamic lubrication (EHL) and gear mesh. Numerical calculation of these equations has been made progress by using MATLAB software under the premise of no analytical solution. The efficiency of each point on line of action has been received. And then the influence of confriction in intertooth space to transmission efficiency under EHL has been analyzed. The results can be provided as argument and numerical value reference for optimization of the gearbox lectotype in areogenerator to make the efficiency maximized, and for further research on transmission efficiency of planet gear train.
Appearance Design Research of Home Sealing Machine for Bagged Food
Authors: Pan Li Ai , Cheng Xian Chun , Du Qiu Lei
Published: December 2012

With technology changing rapidly, design of sealing machine for bagged food is also already at the leading edge of the times. This single-layer film and sealing a variety of composite membrane is widely used in food, pharmaceutical, seed, chemical, light industry and other departments. In modern life, it can say that we have all the time with the "seal" has a direct or indirect contact. Therefore, the design of a simple food vacuum bag-sealing machine, it went into the family, Is the common expectations of consumers.In paper, principle of sealing machine for bagged food has been discussed and the vacuum sealing machine including use function and art function has been designed. The sealing machine is fit for home and can prevent food in refrigerator dehydrating, mixing smell, deteriorating etc.
Virtual Prototype Modeling and Dynamic Simulation for a Large Pendulum
Authors: Lin Wei Ming , Zhang Yong , Xiang Hui Yu , Han Bao An
Published: December 2012

The large pendulum is a new kind of amusement devices. Virtual modeling and dynamic simulation based on virtual prototyping technology have been done for the structure analysis of the large pendulum. The speed, acceleration and load curves for each component on the large pendulum under different operation conditions have been acquired, which provides a reliable basis for further strength and security analysis. The result shows that the virtual prototype and dynamic simulation is an effective way to enhance the design reliability of the large pendulum.
Study on Dynamic Simulation of Hydraulic Die Forging Hammer Based on VPT
Authors: Zhang Yin Juan
Published: December 2012

The method to precise control the motion of basic virtual prototyping technology (VPT) is put forward in this paper. The hydraulic die forging hammer structure, work principle, and the VPT design idea are introduced. The parametric solid parts model and entire assembly model are all designed based on solidworks software. The dynamic state simulation process of hammer is carried on. The result indicated that the dynamic process parameter of hammer was gained. The dynamic state working process of hydraulic die forging hammer is precisely controlled, which provides the foundation to further realize the numerical controlled and flexible of hydraulic die forging hammer.
Vibration Modal Analysis of the Upper Frame of Hydraulic Excavator
Authors: Zuo Cui Peng , Zhou Yi Qi , Huo Rui , Wang Li , Li Hao
Published: December 2012

As the upper frame is an essential supporting structure of Hydraulic Excavator, dynamic characteristics of the structure are particularly important. The finite element model of the upper frame is established by the finite element analysis software, and then modal analysis is carried out in absolute freeness. The former fifteen modes are adopted to review its inherent frequencies and vibration modes seriously, and the dynamic characteristics of the frame are clear. Analysis result indicates that there are some weak links in the structure, and suggestions of modification are put forward for the further structure improvement.
The Design of Transmission Scheme of the 6-Speed Automatic Transmission Based on the 01N Automatic Transmission
Authors: You Ming Fu , Wen Qiang , Zheng Ming Feng , Li Zhi Wei
Published: December 2012

The power performance and fuel economy could be improved by increasing the shift. The 01N automatic transmission was a Navgneaus planetary gear mechanism with four forward gears, and the 6-speed transmission scheme was achieved by the planetary in series with the Navgneaus planetary gear mechanism. The original lever method was expanded for its limitation, the 6-speed transmission mechanism can be analyzed perfectly by the expanded lever method. The lever method was validated accurate and feasible.
The Gate of General Top-Open Freight Train Security Investigation
Authors: Gou Rui , Huang Tao
Published: December 2012

There are some defects in domestic freight train design, in recent years despite the freight train constant improvement of its load capacity and develop new type of heavy freight train. But the influence of the people and related operation safety and efficiency elements to be considered fewer in these improved designs. And in which the gate is a very important factor but always to be neglected. That the gate structure and its ergonomics factors are not suitable for transportation production, thus presents a lot of directly or indirectly influenced safety factors influence on transportation production. This article is aim at provide improvement of the gate of the top-open-freight-train research approaches through survey in Chengdu and Lanzhou railway station and Mei Shan Vehicle Co., Ltd and collection, analysis the gate related safety, productive efficiency cases.
Methods for Determining the Dynamic Load of the Shipbuilding Gantry Crane
Authors: Qian Xia Yi , Yin Chen Bo , Ma Feng
Published: December 2012

Aim at the difficulty in determining the dynamic load , dynamic problems were analyzed, including three mechanisms of the shipbuilding gantry crane of lifting、trolley running and cart running under the joint starting and braking by adopting the method for determining the dynamic load based on the vibration theory and the one for determining the dynamic load based on the virtual prototype.Dynamic models and virtual prototype model were established and the time-varying dynamic loads of mechanisms were determined under typical working conditions. The maximum dynamic load obtained provides a reference for the dynamic finite element analysis of the shipbuilding gantry crane.
Finite Element Stress Analysis of Intersection Region of Nozzle and Blind Flange
Authors: Dong Jun Hua , Gao Bing Jun
Published: December 2012

The stress analysis of the intersections region of nozzle & blind flange is implemented by means of FEA. The stress variation rule was obtained and the maximum Stress intensity is at the inside of intersections region of nozzle & blind flange. In accordance with JB4732-1995 (2005 Confirmed edition), the safety of structure was evaluated. The results show that the dimensiom given in the paper can meet the requirement for safety.
Design and Analysis of Hydro-Viscous Winch Hydraulic System
Authors: Meng Qing Rui , Lin Shang Fei , Wang Jian
Published: December 2012

A hydro-viscous winch comprises a disc brake and a hydro-viscous brake. The hydraulic system is of utmost importance to the performance of the winch. To verify the validity of the hydraulic system, by using AMESim software, the simulation model of the hydraulic system was built and the performance analyzed. The results show that 1) the pressure and the flow rate of the disc brake hydraulic system are mainly affected by the energy accumulator; 2) Hydro-viscous brake hydraulic system pressure and lubricating oil flow rate are influenced by orifice diameter of the throttle valve; 3) during the braking period, the amplitude of the deceleration is rather small and the hydro-viscous winch hydraulic system can meet the requirements well. Research achievements of this work provides theoretical basis for optimal design of the hydro-viscous winch hydraulic system.
Research on Pneumatic Performance of Aero-Engine Blades through Function Method
Authors: Liu Wang Sheng , Sun Yan , Shi Guo Dong , Liu Xing Long
Published: December 2012

When we research on pneumatic performance of aero-engine blades,some functions are not solved directly in physical domain because blade coordinates are unknown,but they can be solved after being transformed to computational domain.For potential function and stream function have the orthogonality themselves,mesh of computational domain is orthogonal after orthogonal transformation and the functions are solved easily.The existence conditions are two-dimensional flow continuity equations.If fluid is irrotational and powerful flow,potential function and stream function are both usesd to describe flow field’s velocity,pressure distribution.etc.Therefore,we select potential function and stream function as basic method for researching optimization design of aero-engine blades.
Application of Accuracy Engraving Technique in the Complex Curved Surface Mould Processing
Authors: Liu Xin , Fan Wei
Published: December 2012

The advantages of the precise carving techniques in complex curved surface mould processing are studied. The small tools of carved machine can realize the small size processing which is unachievable for CNC and NC milling machine. The method using accuracy engraving machine to manufacture complex curved surface mould with small features is proposed, so the speed of mould processing is accelerated, the cost of new product development is decreased, the rapid manufacturing is realized and the traditional design method using only CNC and milling machine is improved. Finally, this method has been applied to the processing of a plastic mould and the application method is expounded.
Study on De-Icing Fluid Pump Station’s Flow Pulsation Suspension Methods
Authors: Wang Li Wen , Long Yong Shen , Xing Zhi Wei
Published: December 2012

This article studies the flow pulsation of de-icing fluid pump station. First, find the factors affect the extent of flow pulsation through kinetics analysis. Then, base on the summary of the existing pulsation suspension methods (Include combining work of several pumps with an equal original phase differences, changing a single acting pump with a double acting pump), we put forward the method by optimizing the structure of the reciprocating pump to inhibit the flow pulsation. Use system simulation software AMESim to simulate the effect of these methods. Ultimately get the conclusion that the flow pulsation can be controlled at about 12% through these methods. All these works may provide a reference for the design of a de-icing fluid pumping station.
Collaborative Optimization on Structural Parameters of Scroll Compressor
Authors: Liu Tao , Sun Hui Wei , Wu Zai Xin , Xu Ming Hui
Published: December 2012

The optimization of structural parameters of the scroll compressor is realized by using the method of collaborative optimization. The mathematic models of scroll compressor are established and the Multidisciplinary Design Optimization(MDO) problem is solved by using the iSIGHT software. An example of scroll compressor based on MDO was given to verify the validity and practicability of the model. A set of size parameters which satisfy multiply performance requirements are obtained. The simulations results indicate that both the optimal parameters of scroll compressor and improvement of energy efficiency ratio can be successfully fulfilled by collaborative optimization.
Analysis of the Biomechanics of the Fingers in Different Writing Stances
Authors: Tsai Ming Chang , Huang Shyh Chour
Published: December 2012

The objective of this paper is to study the biomechanics of the fingers when using a pen in different writing stances: the Standard Stance , the Ostrich Stance, the Fist Stance, the Pinching Stance, the Thumb-Tucking Stance and the Two-Finger Stance. In the study, a pen, covered with Optical Fiber Grating (OFG), is used to measure the pressure exerted on the fingers.
Optimization Problem Research for Machining Accuracy and Cost of CNC Lathe Based on Adaptive Particle Swarm Optimization
Authors: Liu Wei Wei , Zheng Ye
Published: December 2012

Based on CNC lathe product’s technical and economic properties demand for manufacturing industry of CNC equipment, this thesis studied the mutual relationship of machining accuracy and cost. According to adaptive particle swarm optimization, a optimization model of the two parts was established. The case of a CNC lathe shows that the optimization model has the advantages of rapid searching, high accuracy, effective and provides a new way for the machining accuracy and cost optimization.
Research on the Internal Model Decoupling Control of High Speed Spindle
Authors: Li Yun Song , Meng Jie , He Ye
Published: December 2012

Due to the structural characteristic, the dynamic performance of the high speed spindle is influenced by multi-coupled parameters. Conventional control method can’t attain the satisfied control result. So the view of internal model decoupling control of high speed motorized spindle is put forward, which can improve the performance of vector control system. In this paper, mathematical model based on internal model control of high speed spindle is set up. And voltage and current of stator are decoupled. At last, through simulation, it is proved that the method can improve the control effect and has better robustness, dynamic characteristic. Therefore, internal model decoupling control of high speed spindle is feasible and effective.