Overview of several common materials for wire drawing dies(1)

- Apr 24, 2019-

(1) The alloy steel mold is an early material for the drawing die. The materials used to make the alloy steel mold are mainly carbon tool steel and alloy tool steel. However, due to the poor hardness and wear resistance of the alloy steel mold and short life, it cannot meet the needs of modern production, so the alloy steel mold is quickly eliminated, and the alloy steel mold is almost invisible in the current production and processing.

(2) The cemented carbide mold is made of cemented carbide. Cemented carbide is a tungsten-cobalt alloy whose main components are tungsten carbide and cobalt. Tungsten carbide is the "skeleton" of the alloy, which is mainly used for hard wear resistance; cobalt is a bond metal and is a source of alloy toughness. Therefore, the cemented carbide mold has the following characteristics compared with the alloy steel mold: high wear resistance, good polishing property, small adhesion, low friction coefficient, low energy consumption, high corrosion resistance, and these characteristics make the brushed carbide The mold has a wide range of processing adaptability and has become the most widely used drawing die.

(3) Natural diamond is an allotrope of carbon. The mold made with it has the characteristics of high hardness and good wear resistance. However, natural diamond is more brittle and difficult to process, and is generally used to manufacture wire drawing dies having a diameter of 1.2 mm or less. In addition, natural diamonds are expensive and supply is scarce, so natural diamond molds are not the economical and practical drawing tools that people ultimately seek.