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

A technology of cubic boron nitride and polycrystalline boron nitride, which is applied in the field of superhard materials, can solve the problems of polycrystalline cubic boron nitride, such as the decrease in wear resistance and poor thermal conductivity, so as to avoid the soft spot effect, improve thermal conductivity, and good Effect 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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  • Binder, cubic boron nitride polycrystalline sintered body and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0019] This embodiment provides a kind of binding agent, and its average particle size is 300nm, is made of the following components by mass: 5 parts of metal aluminum, 50 parts of silicon dioxide, 32 parts of zirconium carbide, 15 parts of titanium diboride 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 the binder, wherein the average particle diameter of the cubic boron nitride 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 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 green body;

[0024] The green body was sintered at 4GPa and 1200° C. for 10...

Embodiment 2

[0026] This embodiment provides a kind of binder, and its average particle size is 267nm, is made of the following components by mass: 4 parts of metal aluminum, 40 parts of silicon dioxide, 47 parts of zirconium carbide, 10 parts of titanium diboride, 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 20-40nm.

[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 the binder; wherein, the average particle diameter of the cubic boron nitride 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 and the cubic boron nitride uniformly to prepare a mixed material;

[0030] Under the condition of 80MPa, press the mixed mat...

Embodiment 3

[0033] This embodiment provides a kind of binder, and its average particle size is 200nm, is made of the following components by mass: 2 parts of metal aluminum, 20 parts of silicon dioxide, 36 parts of zirconium carbide, 13 parts of titanium diboride, 12 parts of titanium nitride, 3 parts of metal magnesium and 2 parts of graphene powder; wherein, the particle diameter of the graphene powder is 20-40nm.

[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 the binder; wherein, the average particle diameter of the cubic boron nitride 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 and the cubic boron nitride uniformly to prepare a mixed material;

[0037] Under the condition of 100MPa, press the mixed ...

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Abstract

The invention provides a binder, a cubic boron nitride polycrystalline sintered body and a preparation method thereof, wherein the binder comprises metal aluminum, silicon dioxide, zirconium carbide,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 aluminum oxideis 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 aceramic 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, a cubic boron nitride 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 chemical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/5831C04B35/622
CPCC04B35/5831C04B35/622C04B2235/3418C04B2235/3813C04B2235/3839C04B2235/3886C04B2235/401C04B2235/402C04B2235/425C04B2235/5436C04B2235/96C04B2235/9607
Inventor 王丽娜周青
Owner HENAN HAINADE NEW MATERIAL CO LTD
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