Yong Wei mold steel, DF-2 material, Nanning DF-2 is provided by Yong Wei steel mold. We are Dongguan City An Yongwei mold steel shop (www.dgyongwei.com) located: Dongguan, Guangdong specializes in: mold steel, DC53, SKD11.SUS440C, SUS420 chemical treatment include carburizing, nitriding, boronizing, multicomponent permeation, etc. . Processing methods can be divided according to the gas law, solid law, bath method. Selection of different penetration enhancers and process parameters on the formation of gas carburizing, solid carburizing and salt bath carburizing. Gas method the workpiece is heated in an oven, into the reaction gas at a high temperature activating gas atoms into the workpiece surface. Gas method is relatively simple, but the processing time is generally longer. Solid method is powdered solid penetration and the workpiece is buried in the box, placed in an oven heated, the advantage is simple, the drawback is the quality of the diffusion layer is not stable enough, when a large box of air pollution. Salt bath method is heated to melt the solid state penetration DF-2 suppliers, the workpiece is placed inside the heating bath, good quality general diffusion layer for Boronizing. Permeation and salt bath salt bath nitriding need salt or reactive cyanide appearing in DF-2 uses cyanide, which all belong to virulent import DF-2 mold, should be carefully selected. Meanwhile alloy content increases, but also strengthen the austenite, it is difficult to stress relaxation by plastic deformation, thereby increasing heat stress, increased quench cracking tendencies. However, increased content of alloying elements to improve the steel hardenability, quenching medium available gentler and quenching can reduce quench cracking tendencies. In addition, some alloying elements such as vanadium, niobium, titanium, etc. The role of austenite grain refinement DF-2 steel, steel, to reduce the tendency to overheat, thus reducing the tendency to quench cracking. Shoddy steel material containing impurities, the 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%, length 9M single theory when it weighs 120 kg, and its minimum weight should be: 120X (L-5%) = 114 kg, Weigh 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.