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Preparation process of particle size-mixed polycrystalline diamond compact

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

Active Publication Date: 2019-11-08
JINHUA ZHONGYE SUPERHARD MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 particle size-mixed polycrystalline diamond compact
  • Preparation process of particle size-mixed polycrystalline diamond compact
  • Preparation process of particle size-mixed polycrystalline diamond compact

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Experimental program
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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 invention provide a preparation process of a particle size-mixed polycrystalline diamond compact. The process comprises the following steps of 1), preparing a hard alloy part; 2), preparing a composite transition layer; 3) selecting spherical micron diamond comprising first diamond micro powder with the particle size of 5-7 microns, second diamond micro powder with the particle size of 15-19 microns, third diamond micro powder with the particle size of 25-27 microns and fourth diamond micro powder with the particle size of 35-39 microns, mixing the first diamond micro powder, the second diamond micro powder, the third diamond micro powder and the fourth diamond micro powder, and then mixing and ball milling the mixed powder and a bonding agent; 4) drying the ball milled products underthe protection of inert gas; and 5), pressing the dried products into a polycrystalline diamond compact. According to the process, the mixing ratio of the polycrystalline diamond compact is improved,and the abrasion ratio, the impact toughness and the knoop microhardness of the size-mixed polycrystalline diamond compact are greatly improved.

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 Applications(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