Unlock instant, AI-driven research and patent intelligence for your innovation.

A cemented carbide top hammer and its application in synthesizing superhard materials on a six-sided top press

A technology of cemented carbide anvil and six-sided top press, applied in the application of ultra-high pressure process, the method of chemically changing substances by atmospheric pressure, chemical instruments and methods, etc., can solve the problem of difficult to use high-grade PCD gemstones High-grade diamond and other problems, to achieve the effect of improving the pressure limit and application range, low production cost, high hardness and compressive strength

Active Publication Date: 2018-01-09
成都比拓超硬材料有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country has carried out experimental research on cemented carbide top hammers since the mid-1960s. YG6, YG6X, YG8, YG8C, YG11C, YG15 and other brands were selected for screening tests, and finally the composition of YG8 was determined, and the top hammer was made of medium-grained carbide. Hammer, the hinged six-sided top press commonly used in China for the high-pressure preparation of superhard materials, the top hammer material is WC-Co cemented carbide, usually containing 8% cobalt, that is, the YG8 cemented carbide top hammer, Among them, the average size of tungsten carbide grains is about 2 μm. Due to the limitation of the strength of the material itself, the maximum pressure generated is about 6GPa, which is difficult to be used in the synthesis of high-grade PCD, large-diameter PCD, PCBN and gem-quality diamond.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The WC raw material powder and Co powder were classified and screened separately, and the screened WC powder containing Cr and V additives with a Fisher’s particle size of 0.7 μm and spherical Co powder with a Fisher’s particle size of 1.0 μm were used as raw materials. Among them, Co powder accounted for The total material mass ratio is 8%, Cr and V account for 0.87% and 0.65% of the total material mass ratio, and WC accounts for 90.48% of the total material mass ratio. The wet grinding time is 5:1, and the wet grinding time is 65 hours. After the wet grinding is completed, the wet grinding mixture is dried and granulated by spray drying granulation method, and then the mixture is formed into an anvil compact by a cold isostatic pressing forming process. The anvil compact is sintered by the pressure sintering process. The sintering temperature is 1350 degrees Celsius, and the pressure in the sintering furnace is 6MPa during the sintering and heat preservation stage. Th...

Embodiment 2

[0048] The WC raw material powder and Co powder were classified and screened separately, and the screened WC powder containing Cr and V additives with a Fisher’s particle size of 0.7 μm and spherical Co powder with a Fisher’s particle size of 1.0 μm were used as raw materials. Among them, Co powder accounted for The total material mass ratio is 6%, Cr and V account for 0.87% and 0.65% respectively of the total material mass ratio, and WC accounts for 92.48% of the total material mass ratio. The ratio is 5:1, and the wet grinding time is 65 hours. After the wet grinding is completed, the wet grinding mixture is dried and granulated by spray drying granulation method, and then the mixture is formed into an anvil compact by cold isostatic pressing. , using the pressure sintering process to sinter the top hammer compact, the sintering temperature is 1400 degrees Celsius, and the pressure in the sintering furnace is 7MPa during the sintering and heat preservation stage. The cold-tr...

Embodiment 3

[0058] The WC raw material powder and Co powder were classified and screened separately, and the screened WC powder containing Cr and V additives with a Fisher’s particle size of 0.7 μm and spherical Co powder with a Fisher’s particle size of 1.0 μm were used as raw materials. Among them, Co powder accounted for The total material mass ratio is 7%, Cr and V account for 0.87% and 0.65% respectively of the total material mass ratio, and WC accounts for 91.48% of the total material mass ratio. The ratio is 5:1, and the wet grinding time is 65 hours. After the wet grinding is completed, the wet grinding mixture is dried and granulated by spray drying granulation method, and then the mixture is formed into an anvil compact by cold isostatic pressing. , using the pressure sintering process to sinter the top hammer compact, the sintering temperature is 1400 degrees Celsius, and the pressure in the sintering furnace is 7.5MPa during the sintering and heat preservation stage. The cryog...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
crystal sizeaaaaaaaaaa
crystal sizeaaaaaaaaaa
crystal sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a hard alloy holding-up hammer and application thereof in synthesizing a superhard material on a six-surface diamond presser, and belongs to the technical field of superhard material synthesizing and ultrahigh pressure. The hard alloy holding-up hammer is prepared from, by mass, 3%-8% of cobalt, 0.1%-1.5% of additive Cr3C2, 0.05%-1.5% of VC and the balance WC in alloy, the average grain size of the alloy ranges from 0.3 micron to 3 microns, the porosity of the alloy is smaller than 5%, the Vickers hardness of the alloy ranges from 10.8 GPa to 18 GPa, and the compression strength ranges from 9,000 MPa to 15,500 MPa. The hard alloy holding-up hammer is high in hardness, high in strength, long in service life and capable of improving pressure limit and an application scope of the six-surface diamond presser, and when the hard alloy holding-up hammer is applied to the six-surface diamond presser, the high-performance superhard material can be synthesized.

Description

technical field [0001] The invention belongs to the technical field of superhard material synthesis and ultrahigh pressure, and relates to a cemented carbide anvil, in particular to a cemented carbide anvil and its application in synthesizing superhard materials on a six-sided top press. Background technique [0002] The six-sided press and the two-sided press are two main equipments used in the ultra-high pressure synthesis of superhard materials such as diamond, cubic boron nitride and its composite materials. The six-sided press and the two-sided press are both The hydraulic system is used to pressurize to generate ultra-high pressure in the synthesis chamber, and the connection between the anvil and the internal heating system is used for conductive heating to realize high-temperature and high-pressure synthesis of products. The research and development and production of the world's earliest products such as diamond, cubic boron nitride, gem-grade diamond and polycrystal...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/08B22F7/06B01J3/06
CPCB01J3/065B22F7/06C22C29/08
Inventor 贺端威
Owner 成都比拓超硬材料有限公司