Usually when forging die work. Its cavity surface temperature up to 300 ~ 400 ℃ hot extrusion die up to more than 500 a 800 ℃; casting mold cavity temperature and the type of material and the die-casting temperature. As ferrous metal die-casting mold cavity temperature up to 1000 ℃ or more. This high mold temperature will significantly reduce the hardness and strength of the cavity surface, in use, prone to play crib. To this end. The basic performance requirements for thermal die steel is high resistance thermoplastic change, including high hardness and high temperature strength, high resistance thermoplastic change SLD8, actually reflects the high stability of steel tempering. Ingredients uniformly high-quality steel, cold shear tonnage high SLD8 supplier, cut the head end surface smooth and tidy, but shoddy material difference due to the material, there are often cut off the head and the end face of the phenomenon of meat SLD8 die steel, namely uneven, and no metallic luster. And because of shoddy material product manufacturers Hitachi SLD8 die-cutting head less steel, head and tail will be a big ears. Because many varieties of plastic, plastic products, requirements differ greatly, for the manufacture of plastic mold materials are also proposed a variety of different performance requirements. Therefore, many industrialized countries have formed a wide range of plastic mold steel series. Including carbon steel, carburizing plastic mold steel, pre-hardened plastic mold steel, age-hardening plastic mold steel, corrosion resistant plastic mold steels, free cutting plastic mold steel, through hardened plastic mold steels, martensitic maraging steel and mirror-polished plastic mold steel. The main complex shape, acting demanding small size parts including steel parts, carbon steel parts, the relatively poor thermal conductivity of parts made of steel, to prevent deformation of the characteristics important to prevent cracking. Such a situation can be used quenching. Usually salt bath quenching, its temperature slightly below the transition temperature martensite start, so red-hot piece avoid direct rapid cooling, the thermal stress reduction without affecting the amount of martensite obtained. Dongchu willingness inland mills raw materials is relatively high, steel mills along the coast will be appropriately reserves. Changes in domestic and medium-sized steel mills imported iron ore from the average number of days available inventory point of view, 2011 to 2013, during the Spring Festival every year to October, the average number of days available inventory increased by 2 days, 18 days and 8 days, including 2011 In the fourth quarter due to the overall average number of days inventory is available in more than 30 days of high level, so the replenishment efforts is relatively small. Yong Wei mold steel | SLD8 Wholesales | Shantou SLD8 provided by Yong Wei steel mold. Looking for "Die steel, DC53, SKD11.SUS440C, SUS420" reliable supplier, choose to have the entire network ShangMeng Certified: Dongguan City An Yongwei mold steel shop (www.dgyongwei.com), trustworthiness and reliability, now click on "Commercial Union Support" on page live chat with us now!