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Double-face heat-resistant polycrystalline diamond composite sheet and preparing technology thereof

A technology of polycrystalline diamond and preparation process, which is applied in the field of double-sided heat-resistant polycrystalline diamond composite sheet and its preparation technology, can solve the problem of low heat resistance of ordinary polycrystalline diamond composite sheet, and achieve good azimuth self-regulation, The effect of improving the bonding strength and improving the degree of compactness

Active Publication Date: 2018-12-07
ZHONGNAN DIAMOND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a preparation process of a double-sided heat-resistant polycrystalline diamond composite sheet. One is to solve the problem that the cutting tool made of a single-layer polycrystalline diamond composite sheet has only one-sided cutting performance. Titanium plating treatment is used to make up for the lack of heat resistance of ordinary polycrystalline diamond, and to solve the problem of low heat resistance of ordinary polycrystalline diamond composite sheets, so as to achieve the purpose of improving the service life and performance of tools

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A preparation process for a double-sided heat-resistant polycrystalline diamond composite sheet, comprising the following steps:

[0037] 1) Cobalt removal on the surface of the cemented carbide substrate: wrap the polytetrafluoroethylene protective material on the side of the cemented carbide substrate, and then place it on the HNO 3 :H 2 Etch in a solution with a volume ratio of O of 1:2.5 for 30 min, take out the cemented carbide substrate and wash it with ion water to neutrality to obtain a cemented carbide substrate with decobalt on the upper and lower surfaces, and the thickness of the decobalt layer on the upper and lower surfaces Both are 100 μm, and the cobalt content of the decobaltized layer is 1.2% (weight percent);

[0038] The cemented carbide substrate is composed of 90% WC powder, 9% Co powder and 1% Ce powder composed of the following raw materials by weight percentage. The particle size of the WC powder is 0.8µm, and the specification of the cemented ...

Embodiment 2

[0053] A preparation process for a double-sided heat-resistant polycrystalline diamond composite sheet, comprising the following steps:

[0054] 1) Cobalt removal on the surface of the cemented carbide substrate: wrap the polytetrafluoroethylene protective material on the side of the cemented carbide substrate, and then place it on the HNO 3 :H 2 O volume ratio is 110min in the solution of 1: 3, takes out cemented carbide substrate and rinses to neutrality with ion water, obtains the cemented carbide substrate of upper and lower surface cobalt removal, the thickness of the decobalt layer of upper and lower surface is equal to 200 μm, the cobalt content on the surface of the decobaltized layer is 1.5% (weight percent);

[0055] The cemented carbide substrate is composed of 92.5% WC powder, 7% Co powder and 0.5% Ce powder composed of the following weight percentages. The particle size of the WC powder is 1.2µm, and the specification of the cemented carbide substrate is φ45mm×2....

Embodiment 3

[0070] 1) Cobalt removal on the surface of the cemented carbide substrate: wrap the polytetrafluoroethylene protective material on the side of the cemented carbide substrate, and then place it on the HNO 3 :H 2 Etch in a solution with O volume ratio of 1:2.75 for 70 min, take out the cemented carbide substrate and rinse it with ionized water until neutral to obtain a cemented carbide substrate with decobalt on the upper and lower surfaces, and the thickness of the decobalt layer on the upper and lower surfaces Both are 150 μm, and the cobalt content on the surface of the decobaltized layer is 1.4% (weight percent);

[0071] The cemented carbide substrate is composed of the following raw materials in weight percentage: 91.25% WC powder, 8% Co powder and 0.75% Ce powder. The particle size of the WC powder is 1µm, and the specification is φ45mm×2.0mm.

[0072] 2) Titanium coating on the surface of diamond micropowder: TiO 2 , MgO, NaCl and Al are mixed in a mass ratio of 40:23....

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Abstract

The invention discloses a double-face heat-resistant polycrystalline diamond composite sheet and a preparing technology thereof. The preparing technology of the double-face heat-resistant polycrystalline diamond composite sheet comprises the first step of hard alloy substrate surface cobalt removal, the second step of diamond micro powder surface titanium plating, the third step of titanium plateddiamond micro powder purification, the fourth step of polycrystalline diamond layer powder mixture preparing, the fifth step of composite assembly preparing and the sixth step of composite sheet preparing. The prepared double-face heat-resistant polycrystalline diamond composite sheet meets the machining requirements for high precision and high efficiency of super-hard composite cutters used in the cutting and milling machining technology, the problem that an ordinary polycrystalline diamond composite sheet is not high in heat resistance is solved, accordingly, the service life of tools is prolonged, and the performance of the tools is improved.

Description

technical field [0001] The invention belongs to the technical field of superhard materials, and in particular relates to a double-sided heat-resistant polycrystalline diamond composite sheet and a preparation process thereof. Background technique [0002] Polycrystalline diamond composite sheet is a kind of superhard composite material sintered under high temperature and high pressure conditions with diamond micropowder and cemented carbide matrix as the substrate. Because it has the characteristics of high diamond hardness and good wear resistance, it is also It has the characteristics of strong impact resistance and good weldability of cemented carbide, so it is widely used in the field of machining tools. The traditional polycrystalline diamond composite sheet is generally composed of upper and lower layers of materials, the lower layer is a cemented carbide substrate, and the upper layer is a polycrystalline diamond layer attached to the substrate. The above-mentioned si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/28C23C14/18B22F1/02B22F1/00B22F9/04B22F3/10B22F3/14B22F7/04B22F5/00C22C29/16C22C26/00C22C29/08
CPCC22C26/00C23C14/18C23F1/28B22F3/001B22F3/101B22F3/14B22F5/00B22F7/04B22F9/04B22F2005/001B22F2009/043B22F1/105B22F1/142B22F1/17C23F1/02
Inventor 张涛卢灿华窦明刘俊涛
Owner ZHONGNAN DIAMOND CO LTD
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