Care must be taken in the selection of wire drawing dies. Although the drawing die can be used to process various metal and alloy materials such as steel, copper, tungsten, molybdenum, etc., the drawing die of different materials has its applicable processing range. Therefore, the reasonable selection of the wire drawing die material is the key to ensure successful application. The longest mold life. Different materials have their relatively reasonable processing objects.

Drawing molds can be divided into alloy steel molds, hard alloy molds, natural diamond molds, polycrystalline diamond molds, CVD diamond molds and ceramic molds. It is widely used in high-tech industries such as electronic devices, radar, television, instrumentation and aerospace. It has strong wear resistance and extremely high service life.

For example, when drawing a copper wire of the same diameter, the service life of the polycrystalline diamond mold is 300 to 500 times that of the hard alloy mold, and only 80 to 100 times when the nickel wire is drawn. When the molybdenum wire is drawn, The service life is only 50 to 80 times of the life of the cemented carbide mold, and when the carbon steel is drawn, the life of the polycrystalline diamond mold is only 20 to 60 times that of the cemented carbide mold.

Blind selection, resulting in complex friction and wear of the drawing die, generally divided into two major categories of damage and friction and wear. The damage of the wire drawing die can be divided into ring breaking, tensile failure, shear failure and support surface failure. The friction and wear can be divided into abrasion wear, friction wear, corrosion wear, scratch and wear caused by fine particles.