Manufacturing process of microporous wire-drawing die core made of hard alloy

Abstract

The invention discloses a manufacturing process of a microporous wire-drawing die core made of hard alloy. The process comprises the following steps: taking 0.3 micron ultra-fine grained WC powder as a main material, and controlling the content of Co powder to be 5-8% so as to generate a mixture; carrying out die pressing on the mixture through a mechanical powder forming press; obtaining a die core blank by using a special cutter and a semi-finished product machining technology; carrying out pressure sintering as well as grinding through a centerless grinder to obtain the microporous wire-drawing die core. The manufacturing process has the effects as follows: firstly, when the mixture is produced with changed batch numbers and the shrinkage change is greater, the die needs no re-modification, and all that is needed is to adjust the semi-machining parameters; secondly, special semi-machining equipment is used so that the microporous wire-drawing die core product with high dimensional accuracy can be produced effectively, stably and massively.

Description

technical field [0001] The invention relates to the field of production and manufacture of a microporous wire drawing die core product, in particular to a manufacturing process of a microporous wire drawing die cemented carbide core product. Background technique [0002] There are currently three main materials for drawing metal wire drawing dies: diamond core, polycrystalline wire drawing die, and cemented carbide wire drawing die. The diamond core has good wear resistance, but the price is expensive; the polycrystalline wire drawing die has high material hardness and good wear resistance, and is suitable for drawing tungsten, molybdenum and other metal wires in a high temperature environment, but it is not suitable for drawing steel-like metals. If the wire is too thin, it is easy to cause the steel wire to become brittle, cause necking and broken wire, and reduce the quality of the steel wire. [0003] Tungsten carbide dies have high hardness and toughness, and are suita...

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Problems solved by technology

However, at present, there is basically no R&D and production of wire drawing die alloy core products with a pore diameter of less than 0.20mm in China. Carbide microporous wire drawing die core products have high requirements on materials and are difficult to form, and products with a pore diameter of less than 0.20mm are difficult to form. Our company has successfully filled the domestic blank of this technology

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