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High-temperature-resistant paint film for diamond vacuum reduction and sintering basket

A technology of high temperature resistance and diamond, which is applied in the field of high temperature resistant paint film for diamond vacuum reduction sintering baskets, which can solve the problems of unfavorable automatic production, damage to sintered workpieces, and low safety factor, so as to facilitate normal production, increase safety factor, and prevent adhesion Effect

Active Publication Date: 2016-12-07
ZHONGNAN DIAMOND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sintering basket is composed of a metal skeleton and a metal outer covering. During use, because the upper and lower sintering baskets are often stacked together, the metal outer shell of the sintering basket becomes soft at high temperature, making the The upper and lower stacked sintering baskets are prone to sticking, and it is difficult to separate them during subsequent production operations, which affects normal use and is not conducive to automated production. In addition, sintering baskets are indispensable tooling for automatic lines. If sticking occurs, the entire The automatic line may stop production for about half an hour, which greatly affects normal production
However, if it is forcibly removed, it may cause damage to the sintered workpiece, and the safety factor is low, resulting in low production efficiency
However, using existing high-temperature-resistant paints or paints on the market to carry out anti-adhesion coating on the surface of metal sintering baskets, some of them have a temperature that cannot meet the conditions of use, and some of them can achieve certain anti-adhesion although their temperature resistance can meet the conditions of use. effect, but the ingredients in the paint contain organic silicon or inorganic silicon substances that have a great influence on diamonds, and silicon and carbon will form silicon carbide under high temperature conditions, which will destroy the structure and physical properties of diamonds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The proportioning by weight of each component raw material of the high temperature resistant paint film of the present invention can be: 12 parts of aluminum oxide micropowder, 5 parts of dititanium nitride micropowder, 8 parts of calcium hexaboride micropowder, 10 parts of chromium trioxide micropowder, 2 parts of graphite, 15 parts of asphalt, 30 parts of gasoline.

[0016] The preparation method of the high-temperature-resistant paint film for diamond vacuum reduction sintering baskets is as follows: first place large pieces of asphalt in a pulverizer, and grind it into small granular asphalt for later use; , in a stainless steel container with h=200, and put the container into a water bath with a water temperature of 80°C for indirect heating to ensure uniform heating. Stir in one direction until the small granular asphalt is completely dissolved, then add graphite according to the stated ratio, stir for 2 minutes, and finally take Al2O3 micropowder, dititanium nitr...

Embodiment 2

[0019] The proportioning by weight of each component raw material of the high temperature resistant paint film of the present invention can be: 13 parts of aluminum oxide micropowder, 8 parts of dititanium nitride micropowder, 9 parts of calcium hexaboride micropowder, 13 parts of chromium trioxide micropowder, 3 parts of graphite, 18 parts of asphalt, 35 parts of gasoline. The preparation method and application method of this paint film are identical with embodiment 1.

Embodiment 3

[0021] The proportioning by weight of each component raw material of the high temperature resistant paint film of the present invention can be: 15 parts of aluminum oxide micropowder, 10 parts of dititanium nitride micropowder, 10 parts of calcium hexaboride micropowder, 15 parts of chromium trioxide micropowder, 4 parts of graphite, 20 parts of asphalt, 40 parts of gasoline. The preparation method and application method of this paint film are identical with embodiment 1.

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PUM

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Abstract

The invention relates to a high-temperature-resistant paint film for a diamond vacuum reduction and sintering basket. The paint film is prepared from, by weight, 12-15 parts of aluminum oxide fine powder, 5-10 parts of dititanium nitride fine powder, 8-10 parts of calcium hexaboride fine powder, 10-15 parts of chromium trioxide fine powder, 2-4 parts of graphite, 15-20 parts of asphalt and 30-40 parts of gasoline. The high-temperature-resistant paint film prepared through the method and the sintering basket coated with the high-temperature-resistant paint film and subjected to high temperature treatment are resistant to high temperature not lower than 1200 DEG C, are durable and can meet normal use conditions of artificial diamond, and adhesion between metal sintering baskets in the high-temperature state can be effectively prevented. Besides, no influence is caused on characteristics and quality of diamond products, the use effect is very good in hoisting and forking in automatic production, and smooth automatic production can be well ensured.

Description

technical field [0001] The invention belongs to the technical field of supporting auxiliary materials for vacuum heat treatment tooling of superhard materials, and in particular relates to a high-temperature-resistant paint film for a diamond vacuum reduction sintering basket. Background technique [0002] Sintering in a vacuum reduction furnace is an important step in the process of synthetic diamond. Metal sintering baskets and non-metallic materials are used to form sintered workpieces, which are placed in a vacuum reduction furnace for sintering. The sintering basket is composed of a metal skeleton and a metal shell covering the outside. During use, because the upper and lower sintering baskets are often stacked together, the metal shell of the sintering basket becomes soft at high temperature, making the The upper and lower stacked sintering baskets are prone to sticking, and it is difficult to separate them during subsequent production operations, which affects normal ...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/12C04B35/622C01B31/06
CPCC04B35/10C04B35/12C04B35/62222C04B2235/3804C04B2235/3886C04B2235/425
Inventor 张凤岭杨怀建李鹏涛徐华雷周飞段德智卢蓓蓓赵丽伟
Owner ZHONGNAN DIAMOND CO LTD
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