SKH-55 high-speed steel mold steel _ _ Yong Ping Jiang Wei-speed steel provided by steel mold, Dongguan City An Yongwei shop. Dongguan City An Yongwei mold steel shop (www.dgyongwei.com) is a professional "mold steel, DC53, SKD11.SUS440C, SUS420" of the company. Since its inception, we adhere to the "honesty, sound management" approach, the courage to healthy competition in the market, so that "Sweden Assab, Daido, Hitachi, Austria Bluff" brand has a good reputation. We adhere to the "service first, customers first" principle, the permanent mold steel Granville won the trust of customers congregation in special steel, and establish a good corporate image. Special Note: This information is for reference pictures and information, please contact us to obtain the most accurate information, thank you! Chemical treatment include carburizing, nitriding, boronizing, multicomponent permeation and so on. Processing methods can be divided according to the gas law, solid law, bath law. 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 S500 speed steel, introduced 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 a furnace heated high-speed steel, its 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 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. have a role austenite grain refinement, reduction overheated steel SKH-55 high-speed steel, thus reducing the quench cracking tendencies. Hardness is the main technical indicators mold steel, mold under high stress constant desire to maintain its shape and size, must have a sufficiently high hardness. Cold work die steel hardness at room temperature is generally maintained at about HRC60, hot work die steel according to their working conditions, general requirements to keep in HRC40 ~ 55 range. For the same kinds of steel, in the range of values ??within a certain hardness, hardness and deformation resistance is proportional; but rather between the composition and organization of different kinds of steel, the plastic deformation resistance may have significant differences with the same hardness value. For austenitic stainless steels, austenitic precipitation hardening stainless steel or other alloys using conventional heat treatment solution treatment methods. The aim is to complete the other phases in the alloy is dissolved in austenite SKH-57 high-speed steel, forming a single-phase solid solution alloys. Also to some extent uniform structure, grain refinement. The method is heated to a single phase austenite region, rapid cooling after incubation (for relatively small size hardened austenitic stainless steel equivalent operation), the temperature of the supersaturated solid solution to room temperature and retained this operation is also called a water toughening treatment . Mills used with the purchase of raw materials to take extremely low inventory strategy, iron ore accounted for as a direct cost of more than 60% of raw materials, of course, is an important object of steel procurement department to monitor the downstream end consumer has not yet seen significant Transit, mills iron ore market is still optimistic about the case, companies will continue to lower raw material inventory policy based. Finally, given the steel industry remains one of the key regulatory and industry regulation, financing borrowing costs compared with other industries also remained high pressure also limits the financial aspects of the procurement activities of enterprises.