Gasket used in thermal simulation test and its preparation method

A thermal simulation and gasket technology, applied in the field of material performance testing, can solve the problem of uneven deformation of the sample, reduce the temperature difference, and improve the problem of uneven deformation of the sample.

Active Publication Date: 2017-05-24
宝武特种冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a gasket, which can effectively solve the problem of uneven deformation of the sample caused by friction and end cooling in the thermal simulation testing machine using induction heating, thereby improving the accuracy of the thermal simulation test results and precision

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Thermal Simulated Compression Gaskets for Titanium Alloys

[0023] a) Fully mix 65% micron-sized titanium alloy metal powder and 30% micron-sized glass powder by mass percentage, then add 5% binder povidone, and fully mix and stir again to obtain a mixed powder;

[0024] b) Press the fully stirred mixed powder into a sheet with a diameter of 14 mm and a height of 1 mm using a mold, which is a thermally simulated compressed gasket for titanium alloys;

[0025] c) During the thermal simulation test, place the pads on both ends of the sample respectively, heat to 1000°C, and perform 50% deformation and compression.

[0026] d) Measure the ratio of the diameter of the middle part of the sample to the diameter of the sample end after compression d = 1.03, keep the ratio of the length of the original sample diameter to the length of the original sample s = 0.02, from the above measured d value and s value, Combined with the previous discussion, it can be considere...

Embodiment 2

[0027] Example 2: Thermally Simulated Compression Gaskets for Superalloys

[0028] a) Fully mix 60% by mass of micron-sized superalloy metal powder and 35% of micron-sized glass powder, then add 5% polyvinyl butyral, and fully mix and stir again to obtain a mixed powder;

[0029] b) Press the fully stirred powder into a sheet with a diameter of 14 mm and a height of 1 mm using a mold;

[0030] c) During the thermal simulation test, place the gasket at both ends of the sample, heat it to 1100°C, and perform 50% deformation and compression;

[0031] d) Measure the ratio of the diameter of the middle part of the sample to the diameter of the end of the sample d=1.04 after compression. Keep the ratio of the length of the diameter of the original sample to the length of the original sample s = 0.03. From the above measured d and s values, combined with the previous discussion, it can be considered that the gasket has a good effect of improving friction and end cooling, and the de...

Embodiment 3

[0032] Example 3: Thermal Simulation Compression Gaskets for Precision Alloys

[0033] a) Fully mix 70% by mass of micron-sized precision alloy metal powder and 25% of micron-sized glass powder, then heat 5% polyethylene glycol, and fully mix and stir again to obtain a mixed powder;

[0034] b) Press the fully stirred mixed powder into thin slices with a diameter of 14 mm and a height of 1 mm using a mold.

[0035] c) During the thermal simulation test, the pads are placed on both ends of the sample, heated to 900°C, and subjected to 50% deformation and compression.

[0036] d) Measure the ratio of the diameter of the middle part of the sample to the diameter of the sample end after compression d = 1.03, keep the ratio of the length of the original sample diameter to the length of the original sample s = 0.03, from the above measured d value and s value, Combined with the previous discussion, it can be considered that the gasket has a good effect of improving friction and end c...

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Abstract

The invention discloses a gasket for thermal simulation test and a preparation method thereof, belonging to the field of detection of material performance. The gasket comprises the following components by weight: 60 to 70% of metal powder, 25 to 35% of glass powder and 3 to 5% of a binder, wherein the particle sizes of the metal powder and the glass powder are both in a micro-nano order. The preparation method for the gasket comprises the following steps: fully mixing the metal powder with glass powder; then adding the binder; and carrying out adequate stirring and then carrying out tableting so as to obtain a thin piece which is the gasket used for reducing nonuniform sample deformation caused by friction and cooling in thermal simulation test. The invention has the following advantages: due to existence of the metal powder, the gasket can be heated through induction; and due to existence of the glass powder, problems in cooling of an end part can be overcome, and a friction coefficient between a pressure head and a sample can be reduced.

Description

technical field [0001] The invention relates to a gasket used in a thermal simulation test and a preparation method thereof, belonging to the field of material performance testing. Background technique [0002] The thermal simulation test machine is an experimental equipment used to study the deformation behavior of materials at high temperatures. There are mainly three deformation modes: compression, tension and torsion. Among them, compression deformation is the most widely used, especially in the metal rolling processing industry. Indispensable equipment for formulating processing technology. However, there are two unfavorable factors in this equipment when carrying out compression tests. One is that the friction between the end of the sample and the indenter causes the sample to be subjected to a radial constraint force on the surface of the end, which makes the deformation of the sample uneven, resulting in a drum shape and uneven distribution of strain, making it impo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/02
Inventor 姚雷张戈郑芳徐长征
Owner 宝武特种冶金有限公司
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