Microwave sintering manufacturing process of a high-density polycrystalline diamond wire drawing die

Abstract

The invention discloses a microwave sintering manufacturing process of a high-density polycrystalline diamond wire drawing die. A microwave sintering method is used to form an insert. The sleeve, the polycrystalline diamond core and the steel sleeve are microwave sintered to form a polycrystalline diamond wire drawing die; the sintering atmosphere is N2+H2, the initial input power is 300-320W, and the temperature rises to 380-400°C, and the input power is adjusted to 380 ‑400W, the temperature rises to 450‑480°C and the input power is adjusted to 300‑320W, the temperature rises to 520‑540°C and keeps warm at this temperature. Using microwave sintering, the grains lack the growth time to obtain fine grain structure, so as to obtain more excellent performance; at the same time, in the sintering process, set a reasonable initial input power, so that the incubation period of the material during the sintering process is reasonable, At the same time, the input power is adjusted according to the temperature change.

Description

technical field [0001] The invention relates to the technical field of wire drawing dies, in particular to a microwave sintering manufacturing process for high-density polycrystalline diamond wire drawing dies. Background technique [0002] In metal pressure processing, the metal is forced to pass through the mold under the action of external force, the metal cross-sectional area is compressed, and the tool that obtains the required cross-sectional area, shape and size is called a wire drawing die, which is a kind of wire drawing die. From thick to thin, the tool gradually reaches the size required by people. It is composed of two parts: the mold sleeve and the mold core. During use, the mold will be damaged to varying degrees due to the effect of drawing. Good quality molds It is very important to improve the production efficiency of the enterprise and reduce the cost of the enterprise. In order to reduce the cost, obtain stable and long-term drawing, accurate size, and bet...

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Problems solved by technology

[0002] In metal pressure processing, the metal is forced to pass through the mold under the action of external force, the metal cross-sectional area is compressed, and the tool that obtains the required cross-sectional area, shape and size is called a wire drawing die, which is a kind of wire drawing die. From thick to thin, the tool gradually reaches the size required by people. It is composed of two parts: the mold sleeve and the mold core. During use, the mold will be damaged to varying degrees due to the effect of drawing. Good quality molds It is very important to improve the production efficiency of the enterprise and reduce the cost of the enterprise. In order to reduce the cost, obtain stable and long-term drawing, accurate size, and better surface quality, it is difficult to achieve without high-quality wire drawing dies.

[0003] Polycrystalline diamond is made of carefully selected high-quality artificial diamond single crystal plus a small amount of silicon, titanium and other binders, which are polymerized under high temperature and high pressure conditions. With its high hardness, high wear resistance and excellent cost performance Such characteristics are more and more favored by the wire drawing industry and become the most widely used core material in the wire drawing industry. However, diamond is brittle and difficult to process. Brittle bursts will occur during the preparation of molds and the use of molds, affecting the product quality of enterprises. , the wire drawing die will be inlaid on the surface of the core to protect the core

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