Composite sheet synthetic block

Abstract

The invention provides a composite sheet composite block for making superhard material sintered bodies such as polycrystalline diamond composite sheets. The composite sheet synthesis block includes a pressure transmission and heat preservation body with a synthesis cavity, and an isolation body arranged in the synthesis cavity, wherein the isolation body includes an isolation tube and two isolation sheets closed at the openings at both ends of the isolation tube, thereby forming an insulating body inside the isolation body. A chamber for accommodating a complex, the outer surface of the spacer is flush with the end face of the isolation tube, and the first shielding tube, the heating tube and the second shielding tube are arranged in sequence outside the isolation body, and are respectively arranged on both sides of the isolation body Two sets of heat-resistant sheets at the end, the two sets of heat-resistant sheets are in contact with the corresponding end faces of the isolation tube, the first shielding tube, the heating tube, the second shielding tube, and the inner surface of the pressure transmission heat preservation body; Two sets of conductive structures on the outside of the chip. The composite sheet synthesis block of the invention is heated evenly, and the manufactured composite sheet has a high yield.

Description

technical field [0001] The invention relates to a composite sheet synthesis block used in the field of superhard material sintered bodies such as polycrystalline diamond composite sheets and cubic boron nitride composite sheets. Background technique [0002] Superhard material sintered products such as polycrystalline diamond compact (PDC) and cubic boron nitride compact (PCBN) are used as a new material because they have the high wear resistance of superhard materials such as diamond and cubic boron nitride. And the weldability of cemented carbide substrate, widely used in oil drilling, geological survey, engineering drilling, mechanical processing and other fields. [0003] At present, during the process of sintering and combining the traditional synthetic block into polycrystalline diamond composite sheet, the synthetic block is extruded by a six-sided top press to generate high pressure, and the high temperature is generated by energizing the synthetic block, so that the...

AI Technical Summary

Problems solved by technology

This composite sheet composite block only has a salt pipe between the product complex and the heating pipe. When sintering, this composite sheet composite block structure has the following disadvantages: On the one hand, the salt pipe and the heating pipe will interact with each other at high temperature. Erosion affects the stability of heating; and the outer pressure transmission insulation layer is easy to penetrate into the synthesis chamber due to high temperature phase change, causing pollution to the complex in the synthesis chamber, resulting in a low pass rate of finished products; on the other hand, the outermost pressure transmission The insulation layer is not isolated from the heating pipe, which will cause the material in the outermost pressure transmission insulation layer to diffuse and erode into the heating pipe, further affecting the heating stability, and the heat dissipation is faster at high temperatures, which is not conducive to the uniform temperature and temperature of the entire synthetic block. maintain

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