(1) alloy steel mould is die early manufacturing materials. Used in the manufacture of alloy steel mould is the main materials of carbon tool steel and alloy tool steel. But because of the hardness and wear resistance of the alloy steel is poor, short life, can not adapt to the needs of modern production, so the alloy steel will soon be eliminated, in the production and processing in the current has been almost invisible alloy steel.
(2) hard alloy die is made of hard alloy. Hard alloy of tungsten cobalt alloy, its main component is tungsten carbide and cobalt. Tungsten carbide alloy is the "skeleton", mainly from the hard wear; cobalt bonded metal alloy, is a source of toughness. Therefore, hard alloy die and alloy steel die compared with the following characteristics: high wear resistance, good polishing, adhesion, friction coefficient is small, energy consumption is low, and the corrosion resistance of high. These characteristics make carbide drawing die has a wide range of processing adaptability, become today's most widely used wire drawing die.
(3) natural diamond are allotropes of carbon, with the mold making it has the characteristics of high hardness and good wear resistance etc.. But the natural diamond is more brittle and difficult to process, and is generally used to make the drawing die with the diameter below 1.2mm. In addition, natural diamond prices are expensive, supply shortage, so the natural diamond model is not the end of the people seeking the economic and practical drawing tool.
(4) polycrystalline diamond is used after carefully selected high quality synthetic diamond single crystal with a small amount of silicon and titanium bond, under the conditions of high temperature and high pressure polymerization. Polycrystalline diamond of high hardness and good wear resistance, compared with other materials, it has its own unique advantages: due to the anisotropy of natural diamond, in the drawing process, when around the hole in the working state, natural diamond in the hole of a position will occur preferentially wear; and polycrystalline diamond belongs to multi crystal, has isotropic characteristics, thus avoiding the die hole wear is not uniform and the die hole Buyuan phenomenon. Compared with the hard alloy, the tensile strength of polycrystalline diamond is only 70% of the common hard alloy, but than hard alloy hard 250% so that the polycrystalline diamond die has more advantage than the hard alloy die. Made of polycrystalline diamond drawing die wear resistance, abrasion of the inner hole of the uniform, strong impact resistance, high efficiency of drawing, and the price than the natural diamond much cheaper. The polycrystalline diamond wire drawing die in the wire drawing industry applications.
(5) CVD (chemical vapor deposition) it not only has the single crystal diamond is bright and clean degree, temperature resistance, but also has the advantages of polycrystalline diamond wear resistance and low price, achieved good results in instead of rare natural diamond by drawing tool, it's widely used drawing die industry will bring new vitality.
(6) high performance ceramic material with high hardness, good abrasion resistance, high chemical stability, excellent high-temperature mechanical properties and bonding characteristics is not easy and metal, can be widely used in processing hard processing materials. Nearly 30 years, due to the ceramic material manufacturing process to achieve the effective control of raw material purity and grain size developed the addition of various carbides, nitrides, borides and oxides, whiskers or a small amount of metal technology. And using a variety of toughening mechanism, strength, toughness, impact resistance properties of ceramic materials have been greatly improved.
(7) die coating is a new technology developed recently. The main method is coating on cemented carbide drawing die on metal film. The metal film is pure titanium coating, which has good smoothness, high temperature resistance, but also has the advantages of titanium wear resistance and low price, and good results are achieved in lieu of cemented carbide drawing die tool.
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