Composite sheet synthesis block

Abstract

The invention provides a composite sheet synthesis block used for manufacturing superhard material sintered bodies like polycrystalline diamond composite sheets. The composite sheet synthesis block comprises: a pressure-transmission and heat-preservation body, which is equipped with a synthesis cavity; an isolation body which is arranged in the synthesis cavity and comprises an isolation pipe andtwo isolation sheets arranged at openings at two ends of the isolation pipe in a sealing mode, wherein a cavity used for accommodating a composite body is formed in the isolation body, and the outer surfaces of the isolation sheets are flush with the end surface of the isolation pipe; a first shielding pipe, a heating pipe and a second shielding pipe, which are sequentially arranged outside the isolation body; two groups of heat-resistant sheets, which are arranged at two ends of the isolation body respectively and make contact with the corresponding end surfaces of the isolation pipe, the first shielding pipe, the heating pipe and the second shielding pipe and the inner surface of the pressure-transmission and heat-preservation body respectively; and two groups of conductive structures, which are respectively arranged at the outer sides of two groups of heat-resistant sheets. The composite sheet synthesis block disclosed by the invention is uniform in heating; meanwhile, the yield ofthe manufactured composite sheets is high.

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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