Preparation method of polycrystalline diamond wire-drawing die and synthetic block of polycrystalline diamond wire-drawing die

A technology of polycrystalline diamond and wire drawing dies, which is applied to wire drawing dies and other directions, can solve the problems of uneven sintering, affect product quality, and uneven mixing, so as to reduce post-processing costs, reduce laser cutting processes, and improve heating uniformity. sexual effect

Pending Publication Date: 2021-07-09
XINYA COMPOSITE SUPER HARD MATERIAL CO LTD ZHENGZHOU
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Problems solved by technology

[0002] With the development of the economy, various large-size metal tubes, wires, and rods with high strength and high precision are more and more widely used in communication, transportation, energy, aerospace and other fields, for high-precision pipeline rods The production of polycrystalline diamond usually adopts wire drawing process. Because polycrystalline diamond has the advantages of high hardness, good shape retention and high cost performance, it has more and more replaced traditional carbide wire drawing dies. At present, domestic large-size polycrystalline The six-sided top press is sintered at high temperature and high pressure. During the sintering process, the graphite tube is energized to heat the assembly block, and the inner assembly block is placed inside the graphite tube. However, due to the large size of the large-size polycrystalline diamond wire drawing die blank, the drawing die blank is from outside to inside. The temperature gradient is large, and most of the synthesized products have quality problems such as cracking c

Method used

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  • Preparation method of polycrystalline diamond wire-drawing die and synthetic block of polycrystalline diamond wire-drawing die
  • Preparation method of polycrystalline diamond wire-drawing die and synthetic block of polycrystalline diamond wire-drawing die
  • Preparation method of polycrystalline diamond wire-drawing die and synthetic block of polycrystalline diamond wire-drawing die

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[0034] See Figure 1-6 The present invention provides the following technical solution: a method of preparing a polycrystalline diamond tilation model, including the following steps:

[0035] S1: Preparation of a brigadal mold blank, the bristle model is preset in the middle, and a pre-press-shaped one has a ring-shaped internal block spare of an inner hole;

[0036] S2: Assembly of the synthesis block, place the inner assembly block into the loblast assembly block, forming a synthetic block;

[0037] S3: Synthetic block sintering; sintering the synthetic block in a six-sided tip pressure;

[0038]Among them: S2, the synthesis block includes a lobbone stone 1 and a ring cylindrical inner assembly block packaged inside the Yafa stone 1, and the center of the internal assembly is sequentially set internally, and the internal heating tube is sequentially set. 10, in the inner salt tube 9, the inner assembly of the block is sequentially disposed from the inwardly, an outer heating tube...

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Abstract

The invention belongs to the field of wire-drawing die preparation, and particularly relates to a preparation method of a polycrystalline diamond wire-drawing die. The preparation method of the polycrystalline diamond wire-drawing die comprises the following steps that S1, a wire-drawing die blank is prepared, an inner hole is preset in the middle of the wire-drawing die blank, and an annular inner assembly block with the inner hole is formed in a pre-pressing mode for later use; S2, a synthetic block is assembled: putting the inner assembly block into a pyrophyllite assembly block to prepare the synthetic block; and S3, the synthetic block is sintered; and the synthesized block is sintered in a cubic press. According to the preparation method, an inner heating pipe and an outer heating pipe are respectively arranged at the center and the outer part of the inner assembly block to heat the inner part and the outer part of the inner assembly block at the same time, so that the radial temperature gradient difference of the inner assembly block is reduced, the heating uniformity of the inner assembly block is improved, and the quality defects of cracks, uneven sintering and the like after the wire-drawing die blank is synthesized are greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of preparation of polycrystalline diamond wire drawing die blanks, and in particular relates to a method for preparing polycrystalline diamond wire drawing dies and a synthetic block thereof. Background technique [0002] With the development of the economy, various large-size metal pipes, wires and bars with high strength and high precision are more and more widely used in communication, transportation, energy, aerospace and other fields, for high-precision pipeline bars The production of polycrystalline diamond usually adopts wire drawing process. Because polycrystalline diamond has the advantages of high hardness, good shape retention and high cost performance, it has more and more replaced traditional carbide wire drawing dies. At present, domestic large-size polycrystalline The six-sided top press is sintered at high temperature and high pressure. During the sintering process, the graphite tube is energ...

Claims

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Application Information

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IPC IPC(8): B22F3/14B22F1/00B22F5/00B21C3/02
CPCB21C3/025B22F1/0003B22F3/14B22F5/007
Inventor 孙如芳韩欣骈小璇秦伟丽张志伟刘俊龙
Owner XINYA COMPOSITE SUPER HARD MATERIAL CO LTD ZHENGZHOU
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