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Binder, polycrystalline cubic boron nitride sintered body and preparation method thereof

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

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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  • Binder, polycrystalline cubic boron nitride sintered body and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] This embodiment provides a kind of binder, and its average particle diameter is 300 nm, is made of the following components by mass: 5 parts of metal aluminum, 50 parts of silicon dioxide, 10 parts of silicon carbide, 2 parts of metal titanium and nitrogen 15 parts of titanium oxide.

[0019] This embodiment provides a polycrystalline cubic boron nitride sintered body, which includes the following raw materials in parts by mass: 63 parts of cubic boron nitride and 37 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 polycrystalline cubic boron nitride sintered body, 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 and 1200° C. fo...

Embodiment 2

[0025] This embodiment provides a kind of binder, and its average particle diameter is 267 nm, is made up of the following components by mass: 6 parts of metal aluminum, 60 parts of silicon dioxide, 20 parts of silicon carbide, 3 parts of metal titanium, nitrogen 24 parts of titanium dioxide and 1 part of graphene powder; wherein, the particle diameter of the graphene powder is 20-40 nm.

[0026] This embodiment provides a polycrystalline cubic boron nitride sintered body, which includes the following raw materials in parts by mass: 86 parts of cubic boron nitride and 14 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 polycrystalline cubic boron nitride sintered body, 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 ...

Embodiment 3

[0032] This embodiment provides a kind of binder, and its average particle diameter is 200 nm, is made up of the following components by mass: 6 parts of metal aluminum, 60 parts of silicon dioxide, 14 parts of silicon carbide, 2.5 parts of metal titanium, nitrogen 11 parts of TiN and 2 parts of graphene powder; wherein, the particle diameter of the graphene powder is 20-40 nm.

[0033] This embodiment provides a polycrystalline cubic boron nitride sintered body, which includes the following raw materials in parts by mass: 70 parts of cubic boron nitride and 30 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 polycrystalline cubic boron nitride sintered body, 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 b...

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Abstract

The invention provides a binder, a polycrystalline cubic boron nitride sintered body and a preparation method thereof. The binder includes the following components: metal aluminum, silicon dioxide, silicon carbide, metallic titanium, and titanium nitride, wherein the metal aluminum and the silicon dioxide react during a sintering process to form aluminum oxide and a silicon elementary substance, the melting point of the aluminum oxide is far higher than that of the metal aluminum, and the silicon elementary substance has good thermal conductivity. Therefore, the binder can effectively overcomethe disadvantages of metal binders and ceramic binders, can effectively improve hardness, toughness and thermal conductivity of a cutting tool in a process of preparing the polycrystalline cubic boron nitride sintered body, and has wide adaptability.

Description

technical field [0001] The invention belongs to the field of superhard materials, and in particular relates to a binder, a polycrystalline cubic boron nitride sintered body 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 chemical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/63C04B35/5831C04B35/5835C04B35/622
CPCC04B35/6316C04B35/5831C04B35/622C04B2235/3418C04B2235/3826C04B2235/3886C04B2235/402C04B2235/404C04B2235/425C04B2235/5436C04B2235/5445C04B2235/5454C04B2235/656C04B2235/96C04B2235/9607
Inventor 王丽娜温毓敏
Owner HENAN HAINADE NEW MATERIAL CO LTD
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