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Polycrystalline cubic boron nitride composite sheet

A technology of cubic boron nitride and polycrystalline cubic, which is applied in metal processing equipment, transportation and packaging, and can solve problems such as unsuitability for mass production and cracks in fine-grained composite sheets

Active Publication Date: 2020-12-04
CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the improvement of the preparation method of the composite sheet can solve the defects of the cracks of the fine-grained composite sheet, the improvement of the preparation method will inevitably increase the requirements for the equipment, which is not suitable for mass production

Method used

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  • Polycrystalline cubic boron nitride composite sheet
  • Polycrystalline cubic boron nitride composite sheet
  • Polycrystalline cubic boron nitride composite sheet

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Experimental program
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Effect test

Embodiment 1

[0055] From top to bottom, the polycrystalline cubic boron nitride composite sheet is the first micronano polycrystalline cubic boron nitride layer, the second micronano polycrystalline cubic boron nitride layer, micron polycrystalline cubic boron nitride layer and cemented carbide Floor;

[0056] The total thickness of the first micronano polycrystalline cubic boron nitride layer, the second micronano polycrystalline cubic boron nitride layer and the micron polycrystalline cubic boron nitride layer is 1.5 mm, wherein the first micronano polycrystalline cubic boron nitride layer The thickness of the boron layer is 0.4mm, the thickness of the second micronano polycrystalline cubic boron nitride layer is 0.75mm, the thickness of the micron polycrystalline cubic boron nitride layer is 0.35mm, and the thickness of the cemented carbide layer is 3.2mm. The diameter of the crystal cubic boron nitride composite sheet is 14mm;

[0057] The first micronano polycrystalline cubic boron n...

Embodiment 2

[0069] From top to bottom, the polycrystalline cubic boron nitride composite sheet is the first micronano polycrystalline cubic boron nitride layer, the second micronano polycrystalline cubic boron nitride layer, micron polycrystalline cubic boron nitride layer and cemented carbide Floor;

[0070]The total thickness of the first micronano polycrystalline cubic boron nitride layer, the second micronano polycrystalline cubic boron nitride layer and the micron polycrystalline cubic boron nitride layer is 1 mm, wherein the first micronano polycrystalline cubic boron nitride layer The thickness of the layer is 0.3mm, the thickness of the second micronano polycrystalline cubic boron nitride layer is 0.5mm, the thickness of the micron polycrystalline cubic boron nitride layer is 0.2mm, the thickness of the hard alloy layer is 3mm, and the polycrystalline cubic boron nitride layer is 0.2mm thick. The diameter of the boron nitride composite sheet is 35mm;

[0071] The first micronano ...

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Abstract

The invention provides a polycrystalline cubic boron nitride composite sheet. The polycrystalline cubic boron nitride composite sheet sequentially comprises a first micro-nano polycrystalline cubic boron nitride layer, a second micro-nano polycrystalline cubic boron nitride layer, a micron polycrystalline cubic boron nitride layer and a hard alloy layer, wherein the first micro-nano polycrystalline cubic boron nitride layer is prepared from the following components in percentage by weight: 75-85 wt% of cubic boron nitride and 15-25 wt% of an adhesive; the second micro-nano polycrystalline cubic boron nitride layer is prepared from the following components in percentage by weight: 60-75 wt% of the cubic boron nitride and 25-40 wt% of the adhesive; the cubic boron nitride in the first micro-nano polycrystalline cubic boron nitride layer and the cubic boron nitride in the second micro-nano polycrystalline cubic boron nitride layer comprises micron cubic boron nitride and nano cubic boronnitride; and the micron polycrystalline cubic boron nitride layer comprises micron cubic boron nitride. The polycrystalline cubic boron nitride composite sheet is structurally designed, so that the problem that a fine-grained composite sheet is difficult to sinter is solved, and the comprehensive performance of the composite sheet can be effectively improved.

Description

technical field [0001] The invention belongs to the field of superhard materials, in particular to a polycrystalline cubic boron nitride composite sheet. Background technique [0002] Polycrystalline cubic boron nitride composite sheet, referred to as PcBN composite sheet, is a kind of ultra-thin composite sheet that is made of cubic boron nitride particles and binder as raw materials, hard alloy as matrix, and sintered under high temperature and high pressure conditions through a specific assembly method. Hard composite materials, with excellent characteristics such as high hardness, high wear resistance, and high chemical stability, are mainly used in processing various hardened steels, thermal spray materials, chilled cast iron, cobalt-based and nickel-based materials above HRC35 and other difficult-to-cut materials . [0003] The size of the cubic boron nitride particles in the PcBN composite sheet has a great influence on the wear resistance and damage resistance of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/04B22F1/00
CPCB22F7/04B22F1/10
Inventor 莫培程陈超陈家荣
Owner CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING CO LTD