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Bonding agent for cubic boron nitride, polycrystalline sintered body and preparation method thereof

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

Inactive Publication Date: 2019-04-19
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 for cubic boron nitride, polycrystalline sintered body and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] This embodiment provides a binder for cubic boron nitride, which has an average particle diameter of 300 nm and consists of the following components by mass: 5 parts of metal aluminum, 33 parts of silicon dioxide, 15 parts of nickel oxide, diboron 33 parts of titanium oxide and 15 parts of titanium nitride.

[0020] This embodiment provides a cubic boron nitride polycrystalline sintered body, which includes the following raw materials in parts by mass: 70 parts of cubic boron nitride and 30 parts of binder for cubic boron nitride, wherein the cubic boron nitride The average particle diameter of boron is 10 μm.

[0021] This embodiment provides a method for preparing the cubic boron nitride polycrystalline sintered body, which includes the following steps:

[0022] Mixing the binder for the cubic boron nitride and the cubic boron nitride uniformly to prepare a mixed material;

[0023] Under the condition of 60MPa, press the mixed material into a green body to obtain a ...

Embodiment 2

[0026] This embodiment provides a binder for cubic boron nitride. Its average particle diameter is 267nm, and it is composed of the following components by mass: 3 parts of metal aluminum, 27 parts of silicon dioxide, 5 parts of nickel oxide, diboron 45 parts of titanium oxide, 5 parts of titanium nitride, 7 parts of metal magnesium and 1 part of graphene powder; wherein, the particle diameter of the graphene powder is 26-38nm.

[0027] This embodiment provides a cubic boron nitride polycrystalline sintered body, which includes the following raw materials in parts by mass: 60 parts of cubic boron nitride and 40 parts of binder for the cubic boron nitride; wherein, the cubic boron nitride The average particle size of boron is 7 μm.

[0028] This embodiment provides a method for preparing the cubic boron nitride polycrystalline sintered body, which includes the following steps:

[0029] Mixing the binder for the cubic boron nitride and the cubic boron nitride uniformly to prepa...

Embodiment 3

[0033] This embodiment provides a binder for cubic boron nitride, which has an average particle diameter of 200 nm and consists of the following components by mass: 3 parts of aluminum metal, 32 parts of silicon dioxide, 12 parts of nickel oxide, diboron 40 parts of titanium oxide, 12 parts of titanium nitride, 3 parts of metal magnesium and 1.8 parts of graphene powder; wherein, the particle diameter of the graphene powder is 26-38nm.

[0034] This embodiment provides a cubic boron nitride polycrystalline sintered body, which includes the following raw materials in parts by mass: 80 parts of cubic boron nitride and 20 parts of binder for the cubic boron nitride; wherein, the cubic boron nitride The average particle diameter of boron is 3 μm.

[0035] This embodiment provides a method for preparing the cubic boron nitride polycrystalline sintered body, which includes the following steps:

[0036] Mixing the binder for the cubic boron nitride and the cubic boron nitride unifor...

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Abstract

The invention provides a bonding agent for cubic boron nitride, a polycrystalline sintered body and a preparation method thereof, the binding agent comprises metal aluminum, silicon dioxide, nickel oxide, titanium diboride and titanium nitride, the metal aluminum and the silicon dioxide react in the sintering process to form aluminum oxide and elementary silicon, the melting point of the aluminumoxide is far higher than that of the metal aluminum, and the elementary silicon has good thermal conductivity, so that the binding agent can effectively overcome the defects of a metal binding agent and a ceramic bonding agent, and the binding agent used for preparing the polycrystalline cubic boron nitride sintered body can effectively improve the hardness, the toughness and the heat conduction performance of a cutter, and has wide adaptability.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/63C04B35/5831C04B35/65
CPCC04B35/6303C04B35/5831C04B35/65C04B2235/3206C04B2235/3217C04B2235/3279C04B2235/3418C04B2235/3813C04B2235/3886C04B2235/425C04B2235/428C04B2235/96C04B2235/9607
Inventor 王丽娜周青
Owner HENAN HAINADE NEW MATERIAL CO LTD
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