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 temperature causes the surface hardness and strength of the mold cavity was significantly reduced SLD8 wholesalers prone hit the pile in use. 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, in fact reflects the high stability of steel tempering. Uniform quality steel components, high tonnage cold shears, cut the head end surface smooth and tidy, but shoddy material difference due to the material, there are often cut off the meat first end surface phenomenon, namely uneven, and no metallic luster. And because of shoddy material product manufacturers cut less head, head and tail will be a big ears. Shoddy steel material containing impurities SLD8, density of steel is small, but size tolerance serious, so in case there is no vernier caliper, check that it can be weighed. For example, for steel 20, the national standards set forth in the most negative tolerance of 5%, when a single length 9M its theoretical weight of 120 kg SLD8 die steel, its minimum weight should be: 120X (L-5%) = 114 kg, weighing out the actual weight of 114 kg single smaller than it is shoddy steel, because it exceeded the 5% negative tolerance. PVD is divided into a vacuum deposition, sputtering and ion plating. Ion plating is a combination of vapor deposition and sputtering techniques, ion plating has a strong adhesion force, are good throwing power, the base material to be plated and plating materials can be widely with other advantages, to thereby obtain a wider range of applications. In recent years, multi-arc ion plating people's attention. At present, more in the mold used is ion plating TiN, this film is not only high hardness and good toughness film, combined with strong, high temperature. Multiple TiN film developed on the basis of such (TiAl) N, (TiCr) N, the performance is better than TiN, is a kind of new film is more promising. Yong Wei mold steel, SLD8 sheet, Heyuan 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!