The materials of various drawing dies have their own characteristics. Among them, the natural diamond wire drawing die is the most expensive, and the processing is extremely difficult. At the same time, because of the anisotropy of natural diamond, the hardness varies greatly in the radial range, and it is easy to produce severe wear in a certain direction, so the natural diamond die is only suitable For processing wire with a small diameter. The hardness of the cemented carbide die is low, and the wire drawn with the cemented carbide die has a higher quality and low surface roughness, but the wear resistance of the cemented carbide die is poor and the service life of the die is short. The hardness of the polycrystalline diamond mold is second only to that of natural diamond. Because of its isotropic characteristics, it will not cause a single radial aggravation phenomenon, but its price is very expensive, processing is difficult, and the manufacturing cost is high. CVD coated wire drawing die has good wear resistance due to its diamond properties, and the surface roughness of the drawn wire is low, but the production process of CVD coated wire drawing die is complicated, difficult to process, and high cost; when the coating is worn The later mold will wear out quickly, which is not only difficult to ensure the processing quality, but also cannot be reused and can only be scrapped. Ceramic materials have higher hardness and wear resistance than cemented carbide, and are inexpensive to produce. They are an excellent material for making wire drawing dies between diamond and cemented carbide. However, due to the poor toughness, poor thermal shock and processing difficulties of ceramic materials, it has not yet been widely used