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Synthetic process of compound superhard material

A synthesis process, a technology for superhard materials, applied in the process of applying ultra-high pressure, the method of chemically changing substances by using atmospheric pressure, chemical instruments and methods, etc. and other problems, to achieve the effect that the thermal stability parameters are not much different, the amount of metal dialysis is reduced, and the wear ratio is improved.

Active Publication Date: 2017-05-10
湖南泰鼎新材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This currently used synthesis process has some defects. The most important one is that the metal atoms in the cemented carbide dialysis into the superhard material under the action of high temperature and high pressure; and although the product models in each process are exactly the same, However, the amount of dialysis to the superhard material is inconsistent, which also leads to the metal content in the superhard material ranging from 9 to 20%, and the inconsistent metal content in the superhard material will cause individual product quality in the entire batch of products uneven, unstable
[0003] In addition, through inspection and practical application, the thermal stability of the composite superhard material products prepared by the existing technology is low, and the wear ratio is reduced
Not only that, but the yield rate of the resulting products is low, generally lower than 85%

Method used

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  • Synthetic process of compound superhard material
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The assembled cemented carbide and diamond are placed in the pyrophyllite body, placed in the six top hammers of the six-sided top hydraulic press, first pressurized to 10MPa, and heated to 700℃~800℃ by electric heating to the heating hammer. For 30 seconds, pressurize to 90MPa, heat up to 1400℃~1700℃, after reaching the rated time (5~15 minutes) set by the synthesis process, stop heating, reduce the pressure to zero, and take out the synthesized product.

[0032] The metal content of the superhard material in traditional craft products is 9% to 20%;

[0033] In the product obtained by the above process, the metal content in the superhard material is 1.05% to 5.06%.

[0034] And the thermal stability of the obtained product is improved to some extent, and the difference between the thermal stability parameters before and after welding of the product is 6%.

Embodiment 2

[0036] The assembled cemented carbide and diamond are placed in the pyrophyllite body, and placed in the six top hammers of the six-sided top hydraulic press. When the pressure is first to 10MPa, the heating hammer is heated to 700℃~800℃ by electric heating. The time is 30 seconds, pressurized to 90 MPa, heated to 1400 ℃ ~ 1700 ℃, after reaching the rated time (5 ~ 15 minutes) set by the synthesis process, further pressure is applied on the hammer surfaces of the two heating hammers to make it more The pressure on the hammer surface of the heating hammer is 11% higher. After reaching the rated time (3-5 minutes) set by the synthesis process, the heating is stopped, the pressure is reduced to zero, and the synthesized product is taken out.

[0037] The metal content of superhard materials in traditional craft products is 9% to 20%;

[0038] The metal content of the superhard material in the product obtained by the above process is only 3.14%.

[0039] The difference between th...

Embodiment 3

[0041] The assembled cemented carbide and diamond are placed in the pyrophyllite body, and placed in the six top hammers of the six-sided top hydraulic press. When the pressure is first to 10MPa, the temperature is raised to 700℃~800℃, and the heating time is 30 seconds. Press to 90MPa, heat up to 1400℃~1700℃, and after reaching the rated time set by the synthesis process, apply further pressure on the two heated hammer surfaces to make it 19% higher than the pressure on the four non-heated hammer surfaces. After reaching the rated time set by the synthesis process, the heating is stopped, the pressure is reduced to zero, and the synthesized product is taken out.

[0042] The metal content of the composite working layer in traditional craft products is 9% to 20%;

[0043] The metal content in the superhard material in the product obtained by the above process is only 2.01%.

[0044] The difference between the thermal stability parameters of the product before and after weldin...

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Abstract

The invention discloses a synthetic process of a compound superhard material. The synthetic process comprises the following steps: (1) putting an assembled hard alloy and a superhard material into a pyrophyllite body, putting the pyrophyllite body into a cubic press, pressurizing the pyrophyllite body to 8MPa-10MPa, and heating to 700-800 DEG C; and (2) further pressurizing the pyrophyllite body to 90MPa-100MPa, and heating to 1400-1700 DEG C. By virtue of the synthetic process, the dialysis of hard alloy elements in the compounding process of the superhard material can be reduced, the metal content in the superhard material can be reduced, the yield of the superhard material can be increased, the thermal stability of the superhard material can be improved, and the abrasive ratio can be increased.

Description

technical field [0001] The invention belongs to the field of composite superhard material manufacturing, in particular to a synthesis process of composite superhard material. Background technique [0002] In my country's composite superhard material manufacturing industry, cemented carbide and superhard materials (diamond or cubic boron nitride, etc.) are usually used to synthesize a new composite superhard material product through high temperature and high pressure on a six-sided top hydraulic press. At present, the production process of all composite superhard material products is basically the same, that is, the assembled composite superhard material pyrophyllite is combined into a cube, placed in the six top hammers of the six-sided top hydraulic press, and the pressure of the press system is pressed. After rising to 50-90MPa, turn on the power and directly heat the pyrophyllite cubes of the composite superhard material; when the synthesis pressure reaches the rated pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J3/06
CPCB01J3/062B01J2203/062B01J2203/0645
Inventor 蒋向上蒋孟瑶
Owner 湖南泰鼎新材料有限责任公司
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