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 and the workpiece is buried in the box DF-2 suppliers, placed in an oven heated, the advantage is simple, the drawback is the quality of the diffusion layer is not stable enough, when air pollution out of the box bigger. Salt bath method is heated to melt the solid state penetration, the workpiece is placed inside the heating bath, the diffusion layer is generally better quality DF-2, apply to 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 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 DF-2 material, can reduce the quench cracking tendencies. In addition, some alloying elements such as vanadium, niobium, titanium, which are austenite grain refinement effect, reducing the tendency to overheat the steel, thereby reducing the tendency to quench cracking. Plastic mold steel work, in the long-term effect of cyclic stress often leads to fatigue fracture. In the form of small energy repeated impact fatigue fracture, fatigue fracture contact fatigue fracture tensile and bending fatigue fracture. Heat at a high temperature work die, required to maintain its organization and stability, thereby maintaining a sufficiently high hardness, this performance is called red hardness. Carbon tool steels, low alloy tool steel is usually able to maintain this performance in the temperature range 180 ~ 250 ℃, the chromium-molybdenum steel hot die generally within a temperature range of 550 ~ 600 ℃ to maintain this performance. Red hardness of steel depends on the chemical composition and heat treatment of steel. Studies show that high-carbon and low-alloy tool steel and high-carbon steel can be carried out in carburizing or carbonitriding. Low-carbon steel carburizing or carbonitriding, should choose a lower heating temperature and shorter holding time as possible, then you can ensure that there is more surface core undissolved carbides, carburizing and carbonitriding After penetration, surface granular carbide, carbide, there was a marked increase in the total volume can increase wear resistance of steel. Yong Wei mold steel _DF-2 tool steel _ Nanning DF-2 steel mold provided by Yong Wei. 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!