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Bonding agent, cubic boron nitride polycrystalline composite sheet and preparation method of cubic boron nitride polycrystalline composite sheet

A cubic boron nitride and boron nitride polymerization technology, which is applied in the field of superhard materials, can solve the problems of decreased wear resistance and poor thermal conductivity of polycrystalline cubic boron nitride, so as to avoid the soft spot effect, improve thermal conductivity, and improve thermal conductivity. Effects of hardness and toughness

Inactive Publication Date: 2019-04-05
HENAN HAINADE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Among them, the metal binder usually softens at 700-800°C, which will lead to a decrease in the wear resistance of polycrystalline cubic boron nitride.
Ceramic binder has the advantages of high temperature wear resistance and strong chemical wear resistance, but ceramics have poor thermal conductivity at high temperatures, so that the cutting temperature is concentrated on the processed material and softens it.

Method used

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  • Bonding agent, cubic boron nitride polycrystalline composite sheet and preparation method of cubic boron nitride polycrystalline composite sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment provides a binder with an average particle diameter of 300 nm, consisting of the following components by mass: 5 parts of aluminum metal, 60 parts of silicon dioxide, 3 parts of tungsten carbide, and 15 parts of titanium diboride And 15 parts of titanium nitride.

[0019] This embodiment provides a cubic boron nitride polycrystalline composite sheet, which includes the following raw materials in parts by mass: 73 parts of cubic boron nitride and 27 parts of the binder, wherein the average particle diameter of the cubic boron nitride is 10 μm.

[0020] This embodiment provides the preparation method of the cubic boron nitride polycrystalline compact, which includes the following steps:

[0021] Mixing the binder and the cubic boron nitride uniformly to prepare a mixed material;

[0022] Under the condition of 60 MPa, press the mixed material into a green body to obtain a green body;

[0023] The green body was sintered at 4 GPa, 1200°C for 10 min, and ...

Embodiment 2

[0025] This embodiment provides a binder with an average particle diameter of 267 nm, consisting of the following components by mass: 4 parts of aluminum metal, 25 parts of silicon dioxide, 8 parts of tungsten carbide, and 12 parts of titanium diboride , 11 parts of titanium nitride and 1 part of graphene powder; wherein, the particle diameter of the graphene powder is 20-40 nm.

[0026] This embodiment provides a cubic boron nitride polycrystalline composite sheet, which includes the following raw materials in parts by mass: 82 parts of cubic boron nitride and 18 parts of the binder; wherein, the average particle diameter of the cubic boron nitride is 7 μm.

[0027] This embodiment provides the preparation method of the cubic boron nitride polycrystalline compact, which includes the following steps:

[0028] Mixing the binder and the cubic boron nitride uniformly to prepare a mixed material;

[0029] Under the condition of 80 MPa, press the mixed material into a green body ...

Embodiment 3

[0032] This embodiment provides a binder with an average particle diameter of 200 nm, consisting of the following components by mass: 9 parts of aluminum metal, 60 parts of silicon dioxide, 7 parts of tungsten carbide, and 19 parts of titanium diboride , 17 parts of titanium nitride and 2 parts of graphene powder; wherein, the particle size of the graphene powder is 20-40 nm.

[0033] This embodiment provides a cubic boron nitride polycrystalline composite sheet, which includes the following raw materials in parts by mass: 80 parts of cubic boron nitride and 20 parts of the binder; wherein, the average particle diameter of the cubic boron nitride is 3 μm.

[0034] This embodiment provides the preparation method of the cubic boron nitride polycrystalline compact, which includes the following steps:

[0035] Mixing the binder and the cubic boron nitride uniformly to prepare a mixed material;

[0036] Under the condition of 100 MPa, press the mixed material into a green body to...

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Abstract

The invention provides a bonding agent, a cubic boron nitride polycrystalline composite sheet and a preparation method of the cubic boron nitride polycrystalline composite sheet. The bonding agent iscomposed of metal aluminum, silicon dioxide, tungsten carbide, titanium diboride and titanium nitride, wherein the metal aluminum and the silicon dioxide can react during sintering to produce aluminumoxide and elemental silicon, the melting point of the aluminum oxide is higher than that of the metal aluminum, and the elemental silicon is high in thermal conductivity, so that the bonding agent can effectively overcome the shortcomings of metal bonding agents and ceramic bonding agents. When applied to preparing the cubic boron nitride polycrystalline composite sheet, the bonding agent can effectively improve the hardness, the tenacity and the thermal conductivity of tools and accordingly achieve wide applicability.

Description

technical field [0001] The invention belongs to the field of superhard materials, and in particular relates to a binder, a cubic boron nitride polycrystalline composite sheet and a preparation method thereof. Background technique [0002] Polycrystalline cubic boron nitride is sintered by cubic boron nitride particles and a certain proportion of binder under high temperature and high pressure. The binder plays an important role in the process of synthesizing polycrystalline cubic boron nitride. Adding an appropriate amount of binder can reduce the sintering temperature and pressure, and can improve the performance of the sintered body. Polycrystalline cubic boron nitride binders mainly include metal binders and ceramic binders. [0003] Among them, the metal binder usually softens at 700-800°C, which will lead to a decrease in the wear resistance of polycrystalline cubic boron nitride. Ceramic binder has the advantages of high temperature wear resistance and strong chemica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/5831C04B35/63
CPCC04B35/5831C04B35/6316C04B2235/3418C04B2235/3813C04B2235/3847C04B2235/3886C04B2235/6567C04B2235/96C04B2235/9607
Inventor 王丽娜温毓敏
Owner HENAN HAINADE NEW MATERIAL CO LTD
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