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

Active Publication Date: 2022-04-01
WUHAN NINESTONES SUPERABRASIVES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above improvement measures can improve the sintering of the diamond layer and improve the residual stress distribution inside the composite sheet, but they are not enough to improve the impact toughness of the composite sheet caused by the secondary sintering of the cemented carbide substrate.

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Such as figure 1 As shown, a polycrystalline diamond cemented carbide composite sheet with high impact resistance and toughness includes a diamond composite layer 101 , a cemented carbide substrate 103 and a polyhedral filler block 102 on top of the cemented carbide substrate 103 . Wherein, the polyhedral filling block 102 is provided with a circular top surface 105, a circular bottom surface 106 and side surfaces 113, the top surface edge has a chamfered surface 108 formed by chamfering, and the bottom surface edge has a chamfered surface 109 formed by chamfering. The top of the cemented carbide substrate 103 is provided with a groove complementary to the shape of the above-mentioned polyhedral filler block 102 , and the groove matches the bottom surface 106 of the polyhedron filler block 102 , the side surface 113 and the chamfered surface 109 on the edge of the bottom surface 106 . The combination of the annular inclined surface 107 on the top of the cemented carbide...

Embodiment 2

[0056] Such as figure 2 As shown, the difference between this embodiment and the first embodiment is that the shape of the polyhedron filling block 102 is different, and the polyhedron filling block 102 is also provided with a circular top surface and a circular bottom surface, and the edge of the circular top surface is chamfered. The formed chamfered surface 208 has a chamfered surface 109 formed by chamfering on the edge of the bottom surface, but the polyhedral filling block 102 has no side faces. Furthermore, the cemented carbide substrate 103 has different shapes, and the top of the cemented carbide substrate 103 is provided with a groove that is complementary to the shape of the polyhedron filling block 102, and the bottom surface 106 of the polyhedron filling block 102 and the chamfering surface 109 of the edge thereof are in phase with the groove. match. The annular inclined surface 107 on the top of the cemented carbide substrate 103, the raised conical side 115 an...

Embodiment 3

[0059] Such as image 3 As shown, the structure difference between the present embodiment and the first embodiment is that the polyhedron filling block 102 is provided with a circular top surface 105, a circular bottom surface 106, an upper conical side surface 116, a lower circular conical side surface 119, an annular upper bottom surface 117, an annular Lower bottom surface 118 and side surfaces 113 .

[0060] The top of the cemented carbide substrate 103 is provided with a groove complementary to the shape of the polyhedral filling block 102 , the groove coincides with the circular bottom 106 , the lower frustum side 119 and the annular bottom 118 of the polyhedral filling 102 . The annular upper bottom surface 117 of the polyhedral filling block 102, the upper circular frustum side surface 116 and the circular top surface 105 are combined to form a bonding interface with the diamond powder. The radial section of the diamond composite sheet is circular with a diameter of 1...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/14B22F7/06B01J3/06E21B10/46
CPCB22F3/14B22F7/06B01J3/062E21B10/46B01J2203/062
Inventor 赵海洋肖湘平
Owner WUHAN NINESTONES SUPERABRASIVES CO LTD
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