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CVD diamond coating wire drawing die Coated wire drawing die is the smallest existing coating wire drawing die in China. It is mainly used for wire drawing in the field of stainless steel and hard wire, such as acupuncture wire, etc., instead of polycrystalline and CVD core wire drawing die, diamond coating The drawing die is based on a forming cemented carbide die. After special surface treatment, one or more layers of pure polycrystalline diamond are deposited on the surface of the working area by vapor deposition method. It has both the high strength of cemented carbide and the super wear resistance of diamond. Its comprehensive performance such as life, smoothness and cost performance is much higher than that of existing molds. It can be widely used in various black and non-ferrous metal wires,cables,pipes and bar drawing.