Preparation process of polycrystalline diamond composite sheet with mixed particle size

A polycrystalline diamond, mixed particle size technology, applied in diamond and other directions, can solve the problems of unbalanced wear resistance and strength, unreasonable diamond particle size, poor single parameter, etc., to avoid insufficient sealing, reduce pressure difference, and improve wear and tear. the effect of

Active Publication Date: 2021-05-04
JINHUA ZHONGYE SUPERHARD MATERIALS CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation process of polycrystalline diamond composite sheet with mixed particle size, which solves the problem that in the existing polycrystalline diamond composite sheet with mixed particle size, the diamond particle size is unreasonable, so that the wear resistance and strength cannot be balanced, and the single parameter is relatively low. poor defect

Method used

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  • Preparation process of polycrystalline diamond composite sheet with mixed particle size
  • Preparation process of polycrystalline diamond composite sheet with mixed particle size
  • Preparation process of polycrystalline diamond composite sheet with mixed particle size

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Effect test

Embodiment 1

[0037] A polycrystalline diamond composite sheet of mixed particle size provided by the present invention comprises several uniformly distributed cemented carbide layers arranged on the upper surface, a composite transition layer arranged on the surface of the cemented carbide layer, and the shape of the bottom and the cemented carbide layer Complementary polycrystalline diamond layers.

Embodiment 2

[0039] A kind of preparation technology of polycrystalline diamond composite sheet of mixed particle size provided by the present invention, it comprises the following steps:

[0040] 1) Preparation of cemented carbide parts: select cemented carbide mixture, wherein the main particle size of the powder is 15 microns, and a plurality of special-shaped combined molds are arranged on the surface, and a flow warm pressing molding process is adopted, the molding pressure is 600MPa, and the molding temperature is 160°C; degrease and sinter the molded parts, the sintering temperature is 1300°C, and the time is 12 hours to obtain hard alloy parts;

[0041] 2) Preparation of composite transition layer: adopt CVD method to deposit molybdenum on the cemented carbide groove and surface, and the deposition thickness is 10 microns;

[0042] 3) Spherical micro-diamonds are selected, which include the first diamond powder with a particle size of 5 microns, the second diamond powder with a par...

Embodiment 3

[0048] A kind of preparation technology of polycrystalline diamond composite sheet of mixed particle size provided by the present invention, it comprises the following steps:

[0049] 1) Preparation of cemented carbide parts: select cemented carbide mixture, wherein the main particle size of the powder is 21 microns, and a plurality of special-shaped combined molds are arranged on the surface, and the flowing warm pressing molding process is adopted, the molding pressure is 800MPa, and the molding temperature is 180°C; degrease and sinter the molded parts, the sintering temperature is 1500°C, and the time is 16 hours to obtain hard alloy parts;

[0050] 2) Preparation of composite transition layer: adopt CVD method to deposit molybdenum on the cemented carbide groove and surface, and the deposition thickness is 12 microns;

[0051] 3) Select spherical micro-diamond for use, which includes the first diamond powder with a particle size of 7 microns, the second diamond powder wit...

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Abstract

The preparation process of a polycrystalline diamond composite sheet with a mixed particle size provided by the present invention comprises the following steps: 1) preparation of a hard alloy part; 2) preparation of a composite transition layer; 3) selection of spherical micron diamond, which includes a particle size of The first diamond powder of ~7 microns, the second diamond powder of 15-19 microns, the third diamond powder of 25-27 microns and the fourth diamond powder of 35-39 microns, the first diamond powder , the second diamond micropowder, the third diamond micropowder and the fourth diamond micropowder are mixed and ball-milled with the bonding agent; dried under the protection of an inert gas and pressed into a polychip. The invention improves the proportion of the polycrystalline diamond, which greatly improves the abrasion ratio, impact toughness and Knoop microhardness of the polycrystalline diamond composite sheet with mixed particle size.

Description

technical field [0001] The invention relates to the technical field of polycrystalline diamond composite sheets, in particular to a preparation process of polycrystalline diamond composite sheets with mixed particle sizes. Background technique [0002] At present, with the development of modern manufacturing industry, traditional micron-sized PDC diamond cannot meet the needs of modern industrial applications due to its low impact toughness and poor edge quality. The particle size of the diamond micropowder used in the polycrystalline diamond composite sheet has a great influence on its wear resistance and strength. It is generally believed that the coarser the diamond particle size, the better the wear resistance of PDC, but the lower the strength. From the relationship curve between diamond particle size and PDC wear resistance and strength, it can be seen that when the diamond particle size is below 10 μm, the impact of particle size on PDC wear resistance and strength is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/10B22F3/14C01B32/25
CPCB22F3/10B22F3/14B22F2003/145C01B32/25
Inventor 申建中夏文俊
Owner JINHUA ZHONGYE SUPERHARD MATERIALS CO LTD
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