High impact toughness polycrystalline diamond carbide composite sheet and manufacturing method thereof

A technology of diamond composite sheet and polycrystalline diamond, which is applied to the method of using atmospheric pressure to chemically change substances, chemical instruments and methods, earth square drilling and mining, etc., which can solve the problems of insufficient improvement in the reduction of impact toughness of composite sheets, etc. , to achieve the effects of reducing residual internal stress, reducing metal phase loss, and improving sinterability
CN110919004BActive Publication Date: 2022-04-01WUHAN NINESTONES SUPERABRASIVES CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN NINESTONES SUPERABRASIVES CO LTD
Publication Date
2022-04-01

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Abstract

The invention discloses a polycrystalline diamond hard alloy composite sheet with high impact resistance and toughness, which comprises a cemented carbide substrate and a diamond composite layer. The thermal expansion coefficient and elastic modulus coefficient of the block are between the thermal expansion coefficient and elastic modulus coefficient of the diamond material constituting the diamond composite layer and the cemented carbide material constituting the cemented carbide matrix; It is composed of two or more mixtures of metals of transition elements and their carbides, nitrides, carbonitrides and diamond powder. The polycrystalline diamond cemented carbide composite sheet with high impact resistance and toughness proposed by the present invention reduces the influence of the high temperature and high pressure sintering process on the overall performance of the cemented carbide substrate, and at the same time reduces the internal residual stress of the composite sheet and improves the overall impact resistance of the composite sheet toughness.
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Description

technical field

[0001] The invention relates to the technical field of superhard composite materials, in particular to a polycrystalline diamond hard alloy composite sheet with high impact resistance and toughness and a manufacturing method thereof. Background technique

[0002] Polycrystalline diamond cemented carbide composite sheet (hereinafter referred to as "composite sheet") is sintered by diamond micropowder and cemented carbide substrate under high pressure and high temperature conditions. The diamond composite layer is a wear-resistant working layer, and the cemented carbide substrate plays a supporting role. . The composite sheet not only has the characteristics of high hardness and high wear resistance of diamond, but also has the characteristics of high strength, impact toughness and good weldability of cemented carbide. It is used in oil and gas drilling, geological drilling, engineering excavation, coal mining, etc. It has been widely used in the field and is ...

Claims

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