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Glomerocryst cubic boron nitride composite sheet and preparation method for same

A technology of polycrystalline cubic boron nitride, applied in chemical instruments and methods, layered products, metal layered products, etc., can solve the problems of short service life and low chipping efficiency of polycrystalline cubic boron nitride composite sheets, Achieve the effect of increased cutting depth, extended service life, and no desoldering

Active Publication Date: 2013-06-19
ZHENGZHOU BERLT HARD MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing polycrystalline cubic boron nitride composite sheet has short service life and low chipping efficiency, and a polycrystalline cubic boron nitride composite sheet with long service life and high chipping efficiency is provided, and the Preparation method of the blade

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  • Glomerocryst cubic boron nitride composite sheet and preparation method for same

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Embodiment 1

[0022] Embodiment 1: a kind of preparation method of polycrystalline cubic boron nitride composite sheet is characterized in that it is carried out according to the following steps:

[0023] A. Mix 70g of cubic boron nitride micropowder, 10g of metal bond and 10g of ceramic additive, the particle size of the cubic boron nitride micropowder is 20~30um, the particle size of metal bond is less than or equal to 10um, and the particle size of ceramic additive is less than Equal to 10um;

[0024] B. Put the mixture 4 and the cemented carbide substrate 2 into the molybdenum cup 1 isolated by the shielding layer of the salt pipe 3, wherein the mixture is placed on both sides of the cemented carbide substrate 2, and the installed salt pipe 3 is put into the molybdenum cup 1. Graphite mould, put the graphite mold into the pyrophyllite block 5, put the pyrophyllite block into the cubic boron nitride six-sided top press for pressing and sintering, the sintering process is as follows, firs...

Embodiment 2

[0029] Embodiment 2: a kind of preparation method of polycrystalline cubic boron nitride composite sheet is carried out according to the following steps:

[0030] A. Mix 75g of cubic boron nitride micropowder, 14g of metal bond and 9g of ceramic additive, the particle size of the cubic boron nitride micropowder is 20 ~ 30 um, the particle size of metal bond is less than or equal to 10um, and the particle size of ceramic additive is less than Equal to 10um;

[0031] B. Put the mixture and the cemented carbide substrate into the molybdenum cup isolated by the shielding layer of the salt tube, wherein the mixture is placed on both sides of the cemented carbide substrate, put the installed salt pipe into the graphite mold, and put the graphite mold Put it into the pyrophyllite block, put the pyrophyllite block into the cubic boron nitride six-sided top press for pressing and sintering. Cooling starts after ~2min, synthesis takes 6min~15min. The synthesis time includes heating ti...

Embodiment 3

[0036] Embodiment 3: a kind of preparation method of polycrystalline cubic boron nitride composite sheet is carried out according to the following steps:

[0037] A. Mix 80g of cubic boron nitride micropowder, 15g of metal bond and 8g of ceramic additive, the particle size of the cubic boron nitride micropowder is 20 ~ 30 um, the particle size of metal bond is less than or equal to 10um, and the particle size of ceramic additive is less than Equal to 10um;

[0038] B. Put the mixture and the cemented carbide substrate into the molybdenum cup isolated by the shielding layer of the salt tube, wherein the mixture is placed on both sides of the cemented carbide substrate, put the installed salt pipe into the graphite mold, and put the graphite mold Put it into the pyrophyllite block, put the pyrophyllite block into the cubic boron nitride six-sided top press for pressing and sintering. Cooling starts after ~2min, synthesis takes 6min~15min. The synthesis time includes heating ti...

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Abstract

The invention discloses a glomerocryst cubic boron nitride composite sheet and a preparation method for the same. The glomerocryst cubic boron nitride composite sheet comprises a hard alloy matrix and a glomerocryst cubic boron nitride layer, wherein the glomerocryst cubic boron nitride layer is prepared from the raw materials in the following parts by weight: 70-85 parts of cubic boron nitride micro-powder, 10-15 parts of metallic bond, and 5-10 parts of ceramic additive. The method is performed according to the following steps of: A, uniformly mixing; and B, filling the mixture and the hard alloy matrix in a molybdenum cup provided with a salt tube shielding layer for isolating, heating, and synthesising. Compared with the prior art, the glomerocryst cubic boron nitride composite sheet and the preparation method for the same disclosed by the invention have the beneficial effects that the service life of the composite sheet is prolonged, unsoldering phenomenon is avoided, and cutting efficiency is good.

Description

technical field [0001] The invention relates to a superhard material composite blade, in particular to a double-sided polycrystalline cubic boron nitride composite sheet. Background technique [0002] The polycrystalline cubic boron nitride composite sheet is made of cubic boron nitride and cemented carbide matrix as the substrate, sintered under high temperature and high pressure conditions, and has good hardness and impact toughness. However, during the use of the polycrystalline cubic boron nitride composite sheet, cracks will occur between the polycrystalline cubic boron nitride and the cemented carbide substrate due to alternating cold and heat during use, which shortens the service life of the polycrystalline cubic boron nitride composite sheet. [0003] In addition, single-layer polycrystalline cubic boron nitride composite sheets are prone to faults during machining. At the same time, the cutting edge and cutting length are not large during the cutting process, s...

Claims

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Application Information

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IPC IPC(8): B32B9/04B32B15/00B22F7/02
Inventor 刘书锋
Owner ZHENGZHOU BERLT HARD MATERIALS
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