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Cubic boron nitride superhard cutter

A cubic boron nitride and cutting tool technology, applied in the field of superhard cutting tools, can solve the problems of poor wear resistance, insufficient hardness, difficult to meet processing requirements, etc., and achieve improved wear resistance and heat resistance, good effect and strong hardness. Effect

Inactive Publication Date: 2010-05-26
刘书锋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using cemented carbide and ceramic tools to process high hardness materials, there will be defects such as insufficient hardness and poor wear resistance, which will affect the service life and make it difficult to meet the processing requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: the cutter is made of 75% by weight, cubic boron nitride micropowder of 1 μm in particle size, 3% by weight, boron in microcrystalline powder form with a purity of 99.5%, and boron in a microcrystalline powder form with 10% by weight and a purity of 99.5%. Aluminum, 12% by weight, composed of carbon with a diamond structure.

[0021] Use the following production methods:

[0022] a. Put the cutting tool raw material into the graphite mold, and the graphite mold is sealed by graphite;

[0023] b. Put the mold into the ultra-high pressure synthesis cavity to form an ultra-high pressure assembly block;

[0024] c. Pressurize the tool material to 8.5Gpa and heat it to 1800°C for 60 seconds.

Embodiment 2

[0025] Embodiment 2: The cutter is made of 75% by weight, cubic boron nitride micropowder with a particle size of 10 μm, 2% by weight, boron with a purity of 99.9% microcrystalline powder, 8% by weight, and a microcrystalline powder with a purity of 99.9%. Aluminum, 15% by weight, composed of carbon with a diamond structure.

[0026] Use the following production methods:

[0027] a. Put the cutting tool raw material into the graphite mold, and the graphite mold is sealed by graphite;

[0028] b. Put the mold into the ultra-high pressure synthesis cavity to form an ultra-high pressure assembly block;

[0029] d. Pressurize the tool material to 8.3Gpa and heat it to 1600°C for 80 seconds.

Embodiment 3

[0030] Embodiment 3: the cutter is made of 80% by weight, cubic boron nitride micropowder with a particle size of 5 μm, 1% by weight, boron with a purity of 99.7% microcrystalline powder, and 7% by weight, with a purity of 99.5%. Aluminum, 13% by weight, composed of carbon with a diamond structure.

[0031] Use the following production methods:

[0032] a. Put the cutting tool raw material into the graphite mold, and the graphite mold is sealed by graphite;

[0033] b. Put the mold into the ultra-high pressure synthesis cavity to form an ultra-high pressure assembly block;

[0034] c. Pressurize the cutting tool material to 7Gpa and heat it to 1600°C for 80 seconds.

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PUM

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Abstract

The invention discloses a superhard cutter with high hardness and good abrasive resistance and heat resistance. The cutter comprises the following components in percentage by weight: 75-85 percent of cubic boron nitride micro powder with the granularity of 1-10 mum, 0.5-3 percent of microlite powdered boron with the purity above 99.5 percent, 5-10 percent of microlite powdered aluminum with the purity above 99.5 percent, and 6-15 percent of carbon with a diamond structure. Because the invention is prepared by adopting the cubic boron nitride as a main raw material and adding the high-purity microlite powdered aluminum and the high-purity microlite powdered boron as well as the carbon with the diamond structure under super-high pressure and high temperature, the high hardness, the abrasive resistance and the heat resistance are obviously improved; and the superhard cutter is used for high-hardness alloy materials with turning HRC within 48-53, and has better effect particularly on chromel alloy materials.

Description

technical field [0001] The invention belongs to a superhard cutting tool, in particular to a superhard cutting tool using cubic boron nitride as the main raw material. Background technique [0002] With the continuous development of modern processing technology, the hardness and strength of processed materials are also continuously improving. When using cemented carbide and ceramic tools to process high-hardness materials, there will be defects such as insufficient hardness and poor wear resistance, which will affect the service life and make it difficult to meet the processing requirements. Cubic boron nitride has hardness and thermal conductivity close to that of diamond, and has excellent properties of lower reaction ability with ferrous metal than diamond. Therefore, when processing ferrous metal with high hardness, it is hoped to use tools containing this material for processing. The use of this material can greatly improve the hardness, heat resistance and wear resist...

Claims

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Application Information

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IPC IPC(8): C04B35/5831C04B35/622
Inventor 刘书锋
Owner 刘书锋
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