Source: http://stp.diit.edu.ua/article/view/61015
Timestamp: 2019-04-21 06:36:59+00:00

Document:
Purpose. This research is aimed to obtain the regression dependence of the machinability on the chemical composition of pig iron (C, Cr, Mn and Ni) in cast state. Methodology. The method of active experiment planning was used to build a mathematical model. Cast irons of composition 1.09…3.91 % С; 11.43…25.57 % Cr; 0.6…5.4 % Mn; 0.19…3.01 % Ni were studied. Cutting tools with plates 10х10 mm out of ВК8 according to State Standard 19051-80 were used for turning. Cutting modes: cutting depth – 0.8 mm, longitudinal feed – 0.15 mm/rot., spindle’s rotation frequency during turning – 200…360 rot./min. Lubricating and cooling liquids were not applied. Evaluation of iron workability was produced by determining the linear tool flank wear per unit length of the cutting path. Findings. Mathematically probabilistic equation of the regression dependence of the cutting tool’s wear on the C, Cr, Mn and Ni content in the machined cast iron were obtained. It was established that with the increase of Cr content in the cast iron to 14.8 % the cutting tool’s wear decreased as a result of formation of carbide eutectic which destroyed the doped ledeburite continuous frame. Further increase of chromium content promoted appearing of chromic carbides with high microhardness which considerably increased the tool’s wear. The conducted research shown that the minimum cutting tool’s wear 0,18 mkm/m was observed during the machining of cast iron containing: 1.09 % C, 14.8 % Cr, 2.3 % Mn and 1.2 % Ni; and the maximum wear is 48,96 mkm/m – when the content was: 3.91 % C, 11.43 % Cr, 5.4 % Mn and 0.19 % Ni. The tool’s wear reached 47.61 mkm/m during the treatment of cast iron containing 3.91 % C, 25.57 % Cr, 5.4 % Mn and 0.19 % Ni. Originality. Mathematically probabilistic model of the dependence of the cutting tool’s wear on the C, Cr, Mn and Ni content in the machined cast iron has been elaborated by the author. Practical value. The model allows optimizing the compositions of wear-resistant cast irons for castings which require the significant mechanical machining. Cast irons compositions were recommended for different exploitation conditions.
Vakulenko I.A., Bolshakov V.I. Morfologiya struktury i deformatsionnoye uprochneniye stali [Morphology of structure and strain hardening of steel]. Dnepropetrovsk, Makovetskiy Publ., 2008. 196 p.
Vakulenko I.O. Strukturnyi analiz v materialoznavstvi [Structural analysis in material science]. Dnipropetrovsk, Makovetskyi Publ., 2010. 124 p.
Vakulenko I.O., Kadylnykova T.M., Proidak S.V. Tekhnolohiia mekhanichnoi obrobky metalevykh materialiv [Technology machining of metallic materials]. Dnipropetrovsk, Standart-Servis Publ., 2014. 176 p.
Berkun M.N., Volchok I.P., Zhivitsa I.V., Topal V.I. Vliyaniye termicheskoy obrabotki na svoystva vysokokhromistogo chuguna [Heat treatment impact on the properties of high chrome cast iron]. Metallovedeniye i termicheskaya obrabotka metallov – Material Science and Heat Metal Treatment, 1971, no. 1, pp. 64-66.
Volchok I.P., Netrebko V.V. Osobennosti legirovaniya margantsem iznosostoykikh vysokokhromistykh chugunov [Manganese doping features of wear-resistant and high chrome cast iron]. Lite i metallurgiya – Casting and Metallurgy, 2012, no. 3, pp. 162-165.
Garber M.Ye. Iznosostoykiye belyye chuguny [Wear-resistant white cast irons]. Moscow, Mashinostroyeniye Publ., 2010. 280 p.
Gudremon E. Spetsialnyye stali. T. 1. [Special steel. Vol. 1]. Moscow, Metallurgiya Publ., 1966. 736 p.
Kirillov A.A., Belov V.D., Rozhkova Ye.V. Strukturno i nestrukturno chuvstvitelnyye svoystva khromistykh chugunov [Structural and nonstructural sensitive properties of chromium cast iron]. Chernyye metally – Ferrous, 2007, no. 9, pp. 7-13.
Netrebko V.V. Vliyaniye margantsa na strukturu vysokokhromistykh chugunov [The influence of manganese for structure of high-chromium white cast iron]. Visnyk Dnipropetrovskoho natsionalnoho universytetu zaliznychnoho transportu imeni akademika V. Lazariana [Bulletin of Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan], 2012, issue 42, pp. 167-169.
Netrebko V.V. Vliyaniye fizicheskikh i teplovykh protsessov na strukturu i svoystva vysokokhromistogo chuguna pri obrabotke rezaniyem [Influence of physical and heat processes on the structure and properties of high-chromium cast iron during machining]. Nauka ta prohres transportu – Science and Transport Progress, 2014, no. 6 (54), pp. 97-103. doi: 10.15802/stp2014/33395.
Chabak Yu.G., Yefremenko V.G., Kravtsov A.S. Novyye podkhody k vyboru rezhima smyagchayushchey termicheskoy obrabotki vysokokhromistykh chugunov [New approaches to the selection mode of softening heat treatment of high chrome cast iron]. Tezisy dokladov 73-y mezhdunarodnoy nauchno-prakticheskoy konferentsii «Problemy i perspektivy razvitiya zheleznodorozhnogo transporta» [Proc. of 73d Int. Sci. and Practical Conference «Development questions and prospects of railway transport»]. Dnepropetrovsk, 2013, pp. 282-283.
Chabak Yu.G. Vliyaniye rezhima otzhiga na mikrostrukturu i tverdost vysokokhromistykh chugunov s povyshennym soderzhaniyem austenitoobrazuyushchikh elementov [Annealing cycle effect on the microstructure and hardness of high chrome cast iron with a high content of austenite-promoting elements]. Sbornik nauchnykh trudov «Stroitelstvo, materialovedeniye, mashinostroeniye» [Proc. «Construction, Materials Science, Mechanical Engineering»]. Dnepropetrovsk, 2013, issue 67, pp. 188-192.
Chabak Yu.G., Yefremenko V.G., Stanishevskiy R.R. Strukturnyye izmeneniya v kompleksnolegirovannom belom chugune pri destabiliziruyushchem nagreve [Structutal changes have in complex alloying white iron during destabilizing heating]. Visnyk Dnipropetrovskoho natsionalnoho universytetu zaliznychnoho transportu imeni akademika V. Lazariana [Bulletin of Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan], 2011, issue 38, pp. 229-232.
Kopyciński D., Kawalec M., Szczęsny A., Gilewski R., Piasny S. Analysis of the Structure and Abrasive Wear Resistance of White Cast Iron With Precipitates of Carbides. Archives of Metallurgy and Materials. Institute of metallurgy and materials science of Polish academy of sciences, 2013, vol. 58, issue 3, pp. 973–976. doi: 10.2478/amm-2013-0113.
Belikov S., Volchok I., Netrebko V. Manganese influence on chromium distribution in high-chromium cast iron. Archives of Metallurgy and Materials. Institute of metallurgy and materials science of Polish academy of sciences, 2013, vol. 58, issue 3, pp. 895-897. doi: 10.2478/amm-2013-0095.
Gierek A., Bajka L. Zeliwo stopowe jako tworzywo konstrukcyjne. Katowice, Slask Publ., 1976. 230 p.
Вакуленко, И. А. Морфология структуры и деформационное упрочнение стали / И. А. Вакуленко, В. И. Большаков. – Днепропетровск : Маковецкий, 2008. – 196 с.
Вакуленко, І. О. Структурний аналіз в матеріалознавстві / І. О. Вакуленко. – Дніпропетровськ : Маковецький, 2010. – 124 с.
Вакуленко, І. О. Технологія механічної обробки металевих матеріалів / І. О. Вакуленко, Т. М. Кадильникова, С. В. Пройдак. – Дніпропетровськ : Стандарт-Сервіс, 2014. – 176 с.
Влияние термической обработки на свойства высокохромистого чугуна / М. Н. Беркун, И. П. Волчок, И. В. Живица, В. И. Топал // Металловедение и термическая обработка металлов. – 1971. – № 1. – С. 64–66.
Волчок, И. П. Особенности легирования марганцем износостойких высокохромистых чугунов / И. П. Волчок, В. В. Нетребко // Литье и металлургия. – 2012. – № 3. – С. 162–165.
Гарбер, М. Е. Износостойкие белые чугуны / М. Е. Гарбер. – Москва : Машиностроение, 2010. – 280 с.
Гудремон, Э. Специальные стали. Т. 1 / Э. Гудремон. – Москва : Металлургия, 1966. – 736 с.
Структурно и неструктурно чувствительные свойства хромистых чугунов / А. А. Кириллов, В. Д. Белов, Е. В. Рожкова [и др.] // Черные металлы. – 2007. – № 9. – С. 7–13.
Нетребко, В. В. Влияние марганца на структуру высокохромистых чугунов / В. В. Нетребко // Вісн. Дніпропетр. нац. ун-ту залізн. трансп. ім. акад. В. Лазаряна. – Дніпропетровськ, 2012. – Вип. 42. – С. 167–169.
Нетребко, В. В. Влияние физических и тепловых процессов на структуру и свойства высокохромистого чугуна при обработке резанием / В. В. Нетребко // Наука та прогрес транспорту. – 2014. – № 6 (54). – С. 97–103. doi: 10.15802/-stp2014/33395.
Новые подходы к выбору режима смягчающей термической обработки высокохромистых чугунов / Ю. Г. Чабак, В. Г. Ефременко, А. С. Кравцов [и др.] // Проблемы и перспективы развития ж.-д. трансп. : тез. докл. 73 междунар. науч.-практ. конф. / Днепропетр. нац. ун-т ж.-д. трансп. – Днепропетровск, 2013. – С. 282–283.
Чабак, Ю. Г. Влияние режима отжига на микроструктуру и твердость высокохромистых чугунов с повышенным содержанием аустенитообразующих элементов / Ю. Г. Чабак // Стр-во, материаловедение, машиностроение : сб. науч. тр. / Приднепр. гос акад. стр-ва и архит. – Днепропетровськ, 2013. – Вып. 67. – С. 188–192.
Чабак, Ю. Г. Структурные изменения в комплекснолегированном белом чугуне при дестабилизирующем нагреве / Ю. Г. Чабак, В. Г. Ефременко, Р. Р. Станишевский // Вісн. Дніпропетр. нац. ун-ту залізн. трансп. ім. акад. В. Лазаряна. – Дніпропетровськ, 2011. – Вып. 38. – С. 229–232.
Analysis of the Structure and Abrasive Wear Resistance of White Cast Iron With Precipitates of Carbides / D. Kopyciński, M. Kawalec, A. Szczęsny [et al.] // Archives of Metallurgy and Materials. Institute of metallurgy and materials science of Polish academy of sciences. – 2013. – Vol. 58. – Iss. 3. – P. 973–976. doi: 10.2478/amm-2013-0113.
Belikov, S. Manganese influence on chromium distribution in highchromium cast iron / S. Belikov, I. Volchok, V. Netrebko // Archives of Metallurgy and Materials. – 2013. – Vol. 58. – Iss. 3. – P. 895–897. doi: 10.2478/amm-2013-0095.
Gierek, A. Zeliwo stopowe jako tworzywo konstrukcyjne / A. Gierek, L. Bajka. – Katowice : Slask, 1976. – 230 p.

References: V. 
 V. 
 V. 
 V. 
 V. 
 V.