Patent ID: 12202036

DETAILED DESCRIPTION OF THE EMBODIMENTS

In the following, the technical schemes in the embodiments of the application will be clearly and completely described with reference to the attached drawings. Obviously, the described embodiments form only a part of the embodiments of the application, but not the whole embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative labor belong to the scope of protection of the present application.

In order to make the above objectives, features and advantages of the present application more obvious and easier to understand, the present application will be further described in detail with the attached drawings and specific embodiments.

Referring toFIG.1-FIG.9, the application discloses a system for centrifugal intrusion of molten metal into porous media and then solidification positioning, including:

test cups14, used for placing test medium149and molten metal intrusion148;

a rotor block15, used for mounting the test cups14, where one end of each test cup14for placing the test medium149is far away from the rotor block15;

a constant temperature oil bath preheating device, used for preheating the test cups14and the rotor block15;

a centrifugal device, internally provided with the rotor block15, used for performing a centrifugal operation on the test cups14, where the test cups14and the rotor block15are installed in the centrifugal device after being preheated; and

an infrared heating and compression refrigerating device, arranged inside the centrifugal device, used for controlling a temperature of the test cups14.

In a further optimized scheme, each of the test cups14includes:

a titanium alloy test cup housing142, detachably connected with the rotor block15;

a detachable wedge-shaped titanium alloy pipe sleeve143, coaxially penetrated in the titanium alloy test cup housing142;

a pipe sleeve bottom fastening device144, sleeved outside the detachable wedge-shaped titanium alloy pipe sleeve143;

the detachable wedge-shaped titanium alloy pipe sleeve143includes two symmetrically arranged half-wedge-shaped titanium alloy pipe sleeves, and the pipe sleeve bottom fastening device144is sleeved outside the two symmetrically arranged half-wedge-shaped titanium alloy pipe sleeves, so that the two symmetrically arranged half-wedge-shaped titanium alloy pipe sleeves form a complete detachable wedge-shaped titanium alloy pipe sleeve143and are fixed;

where the pipe sleeve top fastening device145is detachably connected to a top opening of the titanium alloy test cup housing142, and the top end of the detachable wedge-shaped titanium alloy pipe sleeve143penetrates into the pipe sleeve top fastening device145;

a high-temperature resistant plastic pipe146, coaxially penetrated in the detachable wedge-shaped titanium alloy pipe sleeve143;

an aluminum pipe147, coaxially penetrated in the high-temperature resistant plastic pipe146;

the molten metal intrusion148, placed in the aluminum pipe147; and

the test medium149is placed in the high-temperature resistant plastic pipe146, the test medium149is located at a bottom end of the high-temperature resistant plastic pipe146, and a top surface of the test medium149is in contact with a bottom end of the aluminum pipe147and the molten metal intrusion148.

In a further optimized scheme, the constant temperature oil bath preheating device includes:

a test cup constant temperature oil bath preheating furnace, provided with a test cup preheating pot31above, a test cup fixing device32is arranged in the test cup preheating pot31, and the test cups14are detachably connected with the test cup fixing device32;

a rotor block constant temperature oil bath preheating furnace, provided with a rotor block preheating pot33above, a rotor block fixing device34is arranged in the rotor block preheating pot33, and the rotor block15is detachably connected with the rotor block fixing device34; and

a preheating furnace control operating system35, used for controlling the test cup constant temperature oil bath preheating furnace and the rotor block constant temperature oil bath preheating furnace.

The preheating furnace control operating system35is mainly used to control and display the preheating temperature in real time, the test cup preheating pot31is mainly used to preheat the test cups14to melt the molten metal intrusion148, and the rotor block preheating pot33is mainly used to preheat the rotor block15.

In a further optimized scheme, as shown inFIG.10, the centrifugal device includes:

an ultracentrifugal driving system11, fixedly connected to an inner bottom wall of an outer housing16;

the ultracentrifugal driving system11provides power for the centrifugal device;

a large-diameter centrifugal bin12, arranged in the outer housing16and is in transmission connection with the ultracentrifugal driving system11, and an inlet is arranged on a top surface of the outer housing16, and the inlet is correspondingly arranged at a top opening of the large-diameter centrifugal bin12;

a centrifugal bin sealing cover13, detachably connected to the top opening of the large-diameter centrifugal bin12;

the large-diameter centrifugal bin12and the centrifugal bin sealing cover13provide a vacuum environment for the test cups14and the rotor block15, thus reducing the resistance caused by air during the ultra-high speed rotation.

The rotor block15is detachably connected to the bottom wall of the large-diameter centrifugal bin12, and a plurality of test cups14are detachably connected to the outer side wall of the rotor block15. The plurality of test cups14are arranged at equal intervals in the circumferential direction, and the axes of the test cups14face the center of the large-diameter centrifugal bin12.

The test medium149is first placed at that bottom of the high-temperature resistant plastic pipe146, then the high-temperature resistant plastic pipe146filled with the test medium149is put into the aluminum pipe147, and then the molten metal intrusion is put into the aluminum pipe, then the detachable wedge-shaped titanium alloy pipe sleeve143is installed outside the high-temperature resistant plastic pipe146, and the assembled high-temperature resistant plastic pipe146is fixed with the pipe sleeve bottom fastening device144and the pipe sleeve top fastening device145. Finally, the assembled detachable wedge-shaped titanium alloy pipe sleeve143is put into the titanium alloy test cup housing142to complete the test cup assembly. The assembled test cups14and rotor block15are preheated separately, and then the test cups are installed on the rotor block15, and then the whole rotor block15with the test cup installed after preheating is put into the large-diameter centrifugal bin12to complete the sample installation.

In a further optimized scheme, the infrared heating and compression refrigerating device includes:

an annular infrared radiation heating device22, sleeved on an outer side wall of the large-diameter centrifugal bin12, where the annular infrared radiation heating device22is electrically connected with an infrared heating controller21for controlling the annular infrared radiation heating device22; an annular thermal insulation layer23, sleeved on the outer side wall of the annular infrared radiation heating device22to provide a heat source for heating the large-diameter centrifugal bin; and a bottom thermal insulation layer26, arranged on the outer bottom wall of the large-diameter centrifugal bin12;

a bottom refrigerating device25, arranged between the bottom thermal insulation layer26and the outer bottom wall of the large-diameter centrifugal bin12, where the bottom refrigerating device25provides a cold source for the large-diameter centrifugal bin12, and is used to cool the large-diameter centrifugal bin12in the solidification stage of the molten metal intrusion;

a compression refrigerator24, fixedly connected in the outer housing and communicates with the bottom refrigerating device25.

In a further optimized scheme, the outer housing16is further provided with:

a vacuum system4, fixedly connected in the outer housing and communicated with the large-diameter centrifugal bin12;

a data real-time acquisition recorder6, fixedly connected in the outer housing, used for acquiring data in the large-diameter centrifugal bin12; and

a real-time console5, used for controlling the vacuum system4, the data real-time acquisition recorder6, the ultracentrifugal driving system11, the annular infrared radiation heating device22and the compression refrigerator24.

A method for using the system for centrifugal intrusion of molten metal into porous media and then solidification positioning includes the following steps:

filling samples: sequentially filling the test medium149and the molten metal intrusion148into the test cups14;

preheating: preheating the test cups14loaded with the test medium149and the molten metal intrusion148, and the rotor block15by using the constant temperature oil bath preheating device;

centrifuging: installing the test cups14on the rotor block15, installing the rotor block15in the centrifugal device, and performing the centrifugal operation on the test cups14loaded with the test medium149and the molten metal intrusion148; and

taking out the samples: taking out the test cups14after the centrifugal operation and cooling from the centrifugal device, and repeating above steps for an another set of experiment.

In a further optimized scheme, during a centrifuging process, an inside of the centrifugal device is heated by the infrared heating and compression refrigerating device, and a time is started when a rotating speed of the centrifugal device rises to a set required rotating speed, and a molten metal intrusion is completed after reaching a set time; and

the rotating speed of the centrifugal device is reduced, and at a same time, an inside of the centrifugal device is cooled through the infrared heating and compression refrigerating device;

when a temperature in the centrifugal device drops to a set temperature, the temperature is set in the centrifugal device to a room temperature, and work is stopped after reaching a set running time.

One concrete embodiment includes:

S1, sample installation: firstly, the test medium149is put at the bottom of the high-temperature resistant plastic pipe146, then the high-temperature resistant plastic pipe146filled with the test medium149is put into the aluminum pipe147, then the molten metal intrusion148is put in the aluminum pipe, then the detachable wedge-shaped titanium alloy pipe sleeve143is installed outside the high-temperature resistant plastic pipe146, and the assembled high-temperature resistant plastic pipe146is fixed with the pipe sleeve bottom fastening device144and the pipe sleeve top fastening device145; finally, the assembled detachable wedge-shaped titanium alloy pipe sleeve143is put into the titanium alloy test cup housing142to complete the sample installation. In the process of sample installation, it is necessary to pay attention to the consistency of the weights of the three test cups after installing the sample, and the deviation is within the range of ±0.1 g;

S2, preheating of test equipment: firstly, the preheating furnace control operating system35is used to set the preheating temperature of the test cup preheating pot31and the rotor block preheating pot33respectively; then, the detachable wedge-shaped closed titanium alloy ultra-high strength fatigue-resistant and high-temperature resistant test cup14and titanium alloy ultra-high strength fatigue-resistant and high-temperature resistant rotor block15are respectively put into the test cup fixing device32and the rotor block fixing device34; meanwhile, the temperature of the large-diameter centrifugal bin is set by using the real-time console5to preheat the centrifugal bin;

S3, invading molten metal and solidifying and positioning: the preheated detachable wedge-shaped closed titanium alloy ultra-high strength fatigue-resistant and high-temperature resistant test cup14and the titanium alloy ultra-high strength fatigue-resistant and high-temperature resistant rotor block15are taken out, and the titanium alloy ultra-high strength fatigue-resistant and high-temperature resistant test cup14is installed on the titanium alloy ultra-high strength fatigue-resistant and high-temperature resistant rotor block15; the centrifugal bin sealing cover13is opened, and then the whole rotor block15with the test cup installed after preheating is put into the large-diameter centrifugal bin12, the centrifugal bin sealing cover13is closed, and then the real-time console5is used to set the rotating speed, time and temperature required for the test; at this time, the ultracentrifugal driving system11starts to accelerate, and at the same time, the vacuum system4is initiated; when the rotating speed rises to the set required rotating speed, the time is started, and after the time reaches the set time, the molten metal intrusion is completed; then, the real-time console5is used to set a lower fixed rotating speed, running time and lower temperature of the centrifugal bin, and at this time, the ultracentrifugal driving system11starts to decelerate, while the vacuum system4stops working, and the temperatures of the centrifugal bin wall, rotor block and test cup gradually decrease. When the temperature of the large-diameter centrifugal bin12drops to the set temperature, the set temperature is room temperature. When the set running time is reached, the ultracentrifugal driving system11decelerates to 0 again, and metal solidification is completed;

S4, taking out the sample: after the metal is solidified, the centrifugal bin sealing cover13is opened, the titanium alloy ultra-high strength fatigue-resistant and high-temperature resistant rotor block15is taken out, and the test sample is taken out by using the test cup disassembling operation jig141to complete the experiment, the test cup disassembling operation jig141is used to place the test cup14;

S5, repeating the experimental steps S1-S4, and then carrying out next group of experiment of media molten metal intrusion and solidification.

The formula for calculating the intrusion pressure is: P=1/2ρω2 (2L1H+H2)/109;

the melting point of molten metal intrusion is as low as 35-70° C.;

where P is the intrusion pressure;

ρ is the density of the intrusion agent (liquid metal), optionally 8-8.2 g/cm3;

ω2 is the square of angular velocity; ω2-2πn/60;

the centrifugal radius L of the interface between the intrusion agent and the porous substrate sample: 150 mm; L1: the minimum distance between the liquid level of the intrusion agent and the rotation center (L1=L−H);

the liquid column length H of the intrusion agent (liquid metal) is 100 mm;

when the centrifugal speed reaches n=30000 r/min, the intrusion pressure is:
P=1/2ρω2(2L1H+H2)/109
P=1/2*8*(2πn/60)2*(2*50*100+1002)/109=809.3(MPa).

In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms “longitudinal”, “transverse”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” are based on the orientation or positional relationship shown in the drawings are only for the convenience of describing the application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the application.

The above-mentioned embodiments only describe the preferred mode of the application, and do not limit the scope of the application. Under the premise of not departing from the design spirit of the application, various modifications and improvements made by ordinary technicians in the field to the technical scheme of the application shall fall within the protection scope determined by the claims of the application.