Chemical treatment include carburizing, nitriding, boronizing, multicomponent permeation and so on. 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 of the workpiece is buried DF-2, placed in an oven heated in the box, 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, the workpiece is placed inside the heating bath, good quality general diffusion layer for Boronizing. Permeation and salt bath salt bath nitriding reaction of cyanide salts or required in the use of cyanide occurs, which all belong to virulent, should be carefully selected. Meanwhile alloy content increases, but also strengthens the austenite DF-2 tool steel, it is difficult to stress relaxation by plastic deformation, thus increasing the internal 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 wholesalers reduced tendency to overheat the steel, thereby reducing the tendency to quench cracking. According to the needs of the domestic iron and steel enterprises mold and die manufacturing development trend of the market, seize develops high-precision, high toughness, corrosion resistance, high-quality tool steel imports DF-2 new varieties of mold, so that domestic hot and cold mold Steel reached the world advanced level. Shantou mold steel is the basis for industrial production technology and equipment, with mold parts with high accuracy, high complexity, high consistency, high productivity and low consumption advantages, with the rapid development of industry, China's mold manufacturing industry a huge space . It is predicted that in 2010 ~ 2015, China's mold industry average annual growth rate will be around 10%, in 2015 - 2020 at 8% or so. According to the "mold industry," second five "development plan", to 2015, China's total sales will reach 174 billion yuan mold, of which exports accounted for about 15 percent die, that is about $ 4 billion; domestic market, domestic self-made molds rate of more than 85%, the proportion of high-grade die more than 40%; the elimination of cold work hardening, recrystallization, refining and homogenizing tissue. Recrystallization annealing, in order to continue processing and may be used at a relatively high temperature heating: Ac1 above 50-150 ° C, there are many kinds of steel phase transformation may occur. After changing furnace cooling. If, after recrystallization for direct use, then the need to control the grain size should be at a relatively low temperature, such as the general steel is heated at 650-700 ° C. Holding time for a relatively large cross-sectional size of the pieces by 3-4min / mm, for relatively small pieces generally holding time more than 2-3 hours. Cooling annealing method. In fact, the temperature and the degree of recrystallization is largely dependent on the amount of deformation. If the conditions can be considered full recrystallization heating temperature according to the recrystallization of the metal. Yong Wei mold steel | DF-2 steel | Guiping DF-2 is 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!