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Binding agent, polycrystalline cubic boron nitride composite piece and preparing method thereof

A technology of cubic boron nitride and polycrystalline cubic, which is applied in the direction of manufacturing tools, metal processing equipment, grinding/polishing equipment, etc., can solve the problems of reduced wear resistance and poor thermal conductivity of polycrystalline cubic boron nitride, and avoid Effect of soft spot, improved thermal conductivity, good 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 bond usually softens at 700-800°C, which will lead to a decrease in the wear resistance of polycrystalline cubic boron nitride.
Vitrified bond has the advantages of high temperature wear resistance and strong chemical wear resistance, but ceramics have poor thermal conductivity at high temperature, so that the cutting temperature is concentrated on the processed material and softens it.

Method used

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  • Binding agent, polycrystalline cubic boron nitride composite piece and preparing method thereof

Examples

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Embodiment 1

[0018] This embodiment provides a binding agent, which has an average particle diameter of 300 nm and is composed of the following components by mass: 5 parts of metal aluminum, 25 parts of silicon dioxide, 35 parts of titanium diboride, 5 parts of metal tungsten, boron 3 parts of titanium oxide, 8 parts of titanium silicide and 16 parts of titanium nitride.

[0019] This embodiment provides a polycrystalline cubic boron nitride composite sheet, 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.

[0020] This embodiment provides the preparation method of the polycrystalline cubic boron nitride composite sheet, 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 60MPa, press the mixed material into a green body to obtain a gr...

Embodiment 2

[0025] This embodiment provides a binding agent, its average particle size is 267nm, and it is composed of the following components by mass: 10 parts of metal aluminum, 52 parts of silicon dioxide, 22 parts of titanium diboride, 7 parts of titanium boride, 12 parts of titanium silicide, 3 parts of metal tungsten, 8 parts of titanium nitride and 1 part of graphene powder; wherein, the particle size of the graphene powder is 20-40nm.

[0026] The present embodiment provides a polycrystalline cubic boron nitride composite sheet, which includes the following raw materials in parts by mass: 72 parts of cubic boron nitride and 28 parts of the binding agent; 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 composite sheet, which includes the following steps:

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

[0029...

Embodiment 3

[0032] This embodiment provides a binding agent, its average particle diameter is 200nm, and it is composed of the following components by mass: 8 parts of aluminum metal, 40 parts of silicon dioxide, 32 parts of titanium diboride, 3 parts of titanium boride, 11 parts of titanium silicide, 4 parts of metal tungsten, 12 parts of titanium nitride and 2.5 parts of graphene powder; wherein, the particle diameter of the graphene powder is 20-40nm.

[0033] The present embodiment provides a polycrystalline cubic boron nitride composite sheet, which includes the following raw materials in parts by mass: 85 parts of cubic boron nitride and 15 parts of the binding agent; 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 composite sheet, which includes the following steps:

[0035] Mixing the binder and the cubic boron nitride uniformly to prepare a mixed materia...

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Abstract

The invention provides a binding agent, a polycrystalline cubic boron nitride composite piece and a preparing method thereof. The binding agent comprises metal aluminum, silicon dioxide, metal tungsten, titanium boride, titanium diboride, titanium silicide and titanium nitride. In the sintering process, the metal aluminum can have a reaction with the silicon dioxide to form aluminium oxide and elemental silicon, the metal tungsten can be promoted by the titanium silicide to form tungsten nitride or tungsten boride with cubic boron nitride, the binding agent can effectively overcome defects ofa metal binding agent and a ceramic binding agent, and used for the process of preparing the polycrystalline cubic boron nitride composite piece, hardness, toughness and heat conduction properties ofpolycrystalline cubic boron nitride can be effectively improved, and the wide adaptation is achieved.

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 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 improve the performance of the sintered body. Polycrystalline cubic boron nitride binders mainly include metal binders and ceramic binders. [0003] Among them, the metal bond usually softens at 700-800°C, which will lead to a decrease in the wear resistance of polycrystalline cubic boron nitride. Vitrified bond has the advantages of higher high temperature wear resistance and strong chemic...

Claims

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Application Information

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IPC IPC(8): B24D3/04B24D3/34B24D18/00
CPCB24D3/04B24D3/342B24D18/0009
Inventor 王丽娜周青
Owner HENAN HAINADE NEW MATERIAL CO LTD
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