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A polycrystalline cubic boron nitride composite sheet

A cubic boron nitride, polycrystalline cubic technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of fine-grained composite sheet cracks, unsuitable for mass production, etc.

Active Publication Date: 2022-07-22
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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  • A polycrystalline cubic boron nitride composite sheet
  • A polycrystalline cubic boron nitride composite sheet
  • A polycrystalline cubic boron nitride composite sheet

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The polycrystalline cubic boron nitride composite sheet is, from top to bottom, the first micro-nano polycrystalline cubic boron nitride layer, the second micro-nano polycrystalline cubic boron nitride layer, the micron polycrystalline cubic boron nitride layer and the cemented carbide. Floor;

[0056] The total thickness of the first micro-nano polycrystalline cubic boron nitride layer, the second micro-nano polycrystalline cubic boron nitride layer and the micron polycrystalline cubic boron nitride layer is 1.5 mm, wherein the first micro-nano polycrystalline cubic boron nitride layer is The thickness of the boron layer is 0.4mm, the thickness of the second micro-nano 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 composition of the first m...

Embodiment 2

[0069] The polycrystalline cubic boron nitride composite sheet is, from top to bottom, the first micro-nano polycrystalline cubic boron nitride layer, the second micro-nano polycrystalline cubic boron nitride layer, the micron polycrystalline cubic boron nitride layer and the cemented carbide. Floor;

[0070]The total thickness of the first micro-nano polycrystalline cubic boron nitride layer, the second micro-nano polycrystalline cubic boron nitride layer and the micron polycrystalline cubic boron nitride layer is 1 mm, wherein the first micro-nano polycrystalline cubic boron nitride layer is The thickness of the layer is 0.3mm, the thickness of the second micro-nano 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 cemented carbide layer is 3mm, and the thickness of the polycrystalline cubic boron nitride layer is 3mm. The diameter of the boron nitride composite sheet is 35...

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Abstract

The invention provides a polycrystalline cubic boron nitride composite sheet, which 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 cemented carbide layer; the first micro-nano polycrystalline cubic boron nitride layer includes the following components: 75-85 wt % cubic boron nitride and 15-25 wt % binder; the second micro-nano polycrystalline cubic nitrogen The boron nitride layer includes the following components: 60-75wt% cubic boron nitride and 25-40wt% binder; the first micro-nano polycrystalline cubic boron nitride layer and the second micro-nano polycrystalline cubic boron nitride layer The cubic boron nitride includes micro-cubic boron nitride and nano-cubic boron nitride; the micro-polycrystalline cubic boron nitride layer includes micro-cubic boron nitride. The invention solves the problem that the fine-grained composite sheet is difficult to sinter by designing the structure of the polycrystalline cubic boron nitride composite sheet, and can effectively improve the comprehensive performance of the composite sheet.

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-high temperature and high pressure composite sheet, which is made of cubic boron nitride particles and binder as raw materials, cemented carbide as matrix, and sintered under high temperature and high pressure through a specific assembly method. Hard composite material, with excellent characteristics such as high hardness, high wear resistance, high chemical stability, etc., is mainly used in the processing of various hardened steels, thermal spray materials, chilled cast iron and hard-to-cut materials such as cobalt-based and nickel-based materials above HRC35 . [0003] The size of the cubic boron nitride particles in the PcBN composite sheet has a great influence on the wear resistan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/04B22F1/12
CPCB22F7/04B22F1/10
Inventor 莫培程陈超陈家荣
Owner CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING CO LTD