A kind of polycrystalline cubic boron nitride tool material and preparation method thereof

The technology of cubic boron nitride and boron nitride knife is applied in the field of polycrystalline cubic boron nitride cutting tool material and its preparation. Ultimate performance and controllability

Active Publication Date: 2020-10-02
ZHENGZHOU UNIVERSITY OF AERONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The performance of domestically produced cubic boron nitride tool materials is low, and it is difficult to meet the requirements of use. High-performance cubic boron nitride tool materials mainly rely on imports

Method used

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  • A kind of polycrystalline cubic boron nitride tool material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A polycrystalline cubic boron nitride cutting tool material is made of the following raw materials in weight percentage:

[0033] 70% cubic boron nitride powder, 30% binder; the particle size of the cubic boron nitride powder is 1-8 μm; the weight percentage of the binder is composed of the following composition a or composition b;

[0034] Composition a: 10% silicon powder, 5% zirconia, 0.5% ytterbium aluminum garnet, and the balance is SiC powder and Si 3 N 4 powder; among them, SiC powder and Si 3 N 4 The weight ratio of powder is 7:3;

[0035] Composition b: 3% metal powder, 7% silicon powder, 5% zirconia, 0.5% ytterbium aluminum garnet, and the balance is SiC powder and Si 3 N 4 powder; wherein, the metal powder is all Ti powder; SiC powder and Si 3 N 4 The weight ratio of powder is 7:3.

[0036] The preparation method comprises the following steps:

[0037] ① Cubic boron nitride powder treatment: Pickling cubic boron nitride powder with 15 mol / L hydrofluo...

Embodiment 2

[0042] A polycrystalline cubic boron nitride cutting tool material is made of the following raw materials in weight percentage:

[0043] 90% cubic boron nitride powder, 10% binder; the particle size of the cubic boron nitride powder is 8-15 μm; the weight percent composition of the binder is the following composition a or composition b;

[0044] Composition a: 15% silicon powder, 10% zirconia, 1% ytterbium aluminum garnet, and the balance is SiC powder and Si 3 N 4 powder; among them, SiC powder and Si 3 N 4 The weight ratio of powder is 3:7;

[0045] Composition b: 3% metal powder, 12% silicon powder, 10% zirconia, 1% ytterbium aluminum garnet, and the balance is SiC powder and Si 3 N 4 powder; wherein, half of the metal powder is Ti powder, and half is Al powder; SiC powder and Si 3 N 4 The weight ratio of powder is 3:7.

[0046] The preparation method is the same as in Example 1.

Embodiment 3

[0048] A polycrystalline cubic boron nitride cutting tool material is made of the following raw materials in weight percentage:

[0049] 80% cubic boron nitride powder, 20% binder; the particle size of the cubic boron nitride powder is 1-8 μm; the weight percentage of the binder is composed of the following composition a or composition b;

[0050] Composition a: 3% silicon powder, 20% zirconia, 5% ytterbium aluminum garnet, and the balance is SiC powder and Si 3 N 4 powder; among them, SiC powder and Si 3N 4 The weight ratio of powder is 5:5;

[0051] Composition b: 1% metal powder, 2% silicon powder, 20% zirconia, 5% ytterbium aluminum garnet, and the balance is SiC powder and Si 3 N 4 powder; wherein, the metal powder is all Al powder; SiC powder and Si 3 N 4 The weight ratio of powder is 5:5.

[0052] The preparation method is the same as in Example 1.

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Abstract

The invention belongs to the field of PCBN (polycrystalline cubic boron nitride) cutting tool materials and discloses a PCBN cutting tool material and a preparation method thereof. The PCBN cutting tool material is prepared from raw materials in percentage by weight as follows: 30%-95% of cubic boron nitride powder and 5%-70% of a binding agent, wherein the binding agent is prepared from composition a or composition b in percentage by weight, the composition a is prepared from 2%-40% of silica powder, larger than 0 and smaller than or equal to 20% of ZrO2, larger than 0 and smaller than or equal to 5% of YbAG or Yb2O3 and the balance of SiC powder and Si3N4 powder, and a weight ratio of the SiC powder to the Si3N4 powder is random; the composition b is prepared from 1%-10% of metal powder, 1%-30% of silica powder, larger than 0 and smaller than or equal to 20% of ZrO2, larger than 0 and smaller than or equal to 5% of YbAG or Yb2O3 and the balance of SiC powder and Si3N4 powder, the metal powder is one or a mixture of Ti powder and Al powder, and a weight ratio of the SiC powder to the Si3N4 powder is random. The prepared PCBN is high in hardness and excellent in high-temperature performance.

Description

technical field [0001] The invention belongs to the field of polycrystalline cubic boron nitride cutting tool materials, and in particular relates to a polycrystalline cubic boron nitride cutting tool material and a preparation method thereof. Background technique [0002] Cubic boron nitride cutting tool materials have high hardness and wear resistance, stable chemical properties, and high oxidation resistance temperature, and are especially suitable for processing iron-based alloy materials that cannot be processed by diamond tools, so they have huge market potential. In recent years, the proposal and application of high-speed cutting and oil-free cutting have made higher requirements for the high-temperature performance of tool materials. [0003] The performance of domestically produced cubic boron nitride tool materials is low, and it is difficult to meet the requirements of use. High-performance cubic boron nitride tool materials mainly rely on imports. Therefore, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/5831C04B35/645C04B35/65C22C26/00
CPCC04B35/5831C04B35/645C04B35/65C04B2235/3244C04B2235/3463C04B2235/3826C04B2235/3873C04B2235/402C04B2235/404C04B2235/428C04B2235/5436C04B2235/96C22C26/00C22C2026/003
Inventor 丁云鹏张锐高卡樊磊郭晓琴刘军威王海龙
Owner ZHENGZHOU UNIVERSITY OF AERONAUTICS
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