How to choose the material of drawing die

1.The material of the wire drawing die core:Due to the constraints of the working conditions of wire drawing,the material of the wire drawing die core must not only have high hardness and wear resistance,but also have sufficient strength,toughness and a very smooth working surface.Taking into account the corrosion of various lubricants and coatings,it is required to have low adhesion to the surface of the steel wire,small expansion coefficient,high thermal conductivity,and low price and convenient processing.The current wire production mainly uses wire drawing dies made of cemented carbide.

　　The characteristics of cemented carbide materials:cemented carbide is an alloy made of refractory metal hard carbide as aggregate,cobalt as binder,powder metallurgy method,pressure forming and sintering after mixing.The currently used cemented carbides are mainly divided into three categories:tungsten-cobalt,tungsten-cobalt-titanium and tungsten-cobalt-tantalum-titanium.Because the latter two types of alloys are relatively brittle,they are not suitable for use as drawing dies.

　　The correct selection of the material of the wire drawing die of the tungsten-cobalt alloy wire drawing die,the appropriate design of the die hole shape and size,the reasonable formulation of the mold structure and mold repair process,and the accurate and precise processing of the wire drawing die are all of great significance to the production of steel wire.

　　1.The characteristics of cemented carbide materials:cemented carbide is an alloy made of refractory metal hard carbide as aggregate,cobalt as binder,powder metallurgy method,pressure forming and sintering after mixing.The currently used cemented carbides are mainly divided into three categories:tungsten-cobalt,tungsten-cobalt-titanium and tungsten-cobalt-tantalum-titanium.Because the latter two types of alloys are relatively brittle,they are not suitable for use as wire drawing dies.

　　2.The material of the wire drawing die core:Due to the constraints of the working conditions of wire drawing,the material of the wire drawing die core must not only have high hardness and wear resistance,but also have sufficient strength(compressive strength and compressive bending strength),Toughness and a very smooth working surface.At the same time,it is necessary to consider adapting to various lubricants,various coatings,and oxidation including the atmosphere.It requires small adhesion to the steel wire surface,small expansion coefficient and high thermal conductivity.,And factors such as low price and convenient processing.The current wire production mainly uses wire drawing dies made of cemented carbide.

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