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. Its purpose is to the other phases in the alloy is completely dissolved in the austenite single-phase solid solution alloy is formed. 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. In the mold production costs, material costs typically account for 10% to 20%, while the machining, heat treatment, assembly and administrative expenses accounted for more than 80%, so the process performance of the mold is affecting the production cost of the mold and manufacture the main factors of difficulty One. Steel mold processability, thermal processing performance, refers to thermoplastic processing temperature range; cold performance, refers to cutting, grinding, polishing, drawing and other processing performance. Cold work die steel are mostly eutectoid steel and ledeburite DAC, thermal processing and cold performance is not very good, it must be strictly controlled cold thermal processing and process parameters, in order to avoid defects and waste. On the other hand, by increasing the purity of the steel, to reduce the content of harmful impurities, improving tissue state DAC steel rod, in order to improve the hot workability and cold workability of the steel, thus reducing production cost of the mold. Tempers mainly used for ultra-high-strength steel, spring steel, forging mold and other uses tempering tempered troostite tissue. This treatment process so that the steel material is the best elastic limit, a sufficient hardness and a relatively high strength level. Able to completely eliminate the quenching stress, forming part of the granular carbide. The heating temperature is usually 350-500 ° C heat. From the perspective of the current combination, the recent rapid rise in futures prices was mainly due to the replenishment of steel on the spot after a certain boost to the National Day, iron ore futures took the opportunity to repair the structure caused by the depth of the premium, and with continuation rhythm of the market, after a high premium is expected to be further narrowed. However, the structure of the iron ore futures premium actually reflects market expectations of future iron ore prices DAC footage, futures premium to the spot market is relatively bearish on behalf of future ore prices, this structure since iron ore futures before it has been formed, and with the international iron ore supply DAC prices continue to increase, as well as China's steel output growth declined, the future international iron ore market oversupply situation has been basically formed, futures prices continued premium to the spot also consistent with common sense. Aba DAC_ AsiaVest _DAC steel mold manufacturers to provide by Dongguan City An Yongwei steel mold shop. "Die steel, DC53, SKD11.SUS440C, SUS420" preferred Dongguan City An Yongwei steel mold shop (2), the company is located at: 3 A, Dongguan City Changan Ha Kong, the first industrial zone, over the years, Yong Wei mold steel stick providing customers with the best quality service, contact: Simon / R. Welcome to the new and old customers call, letter, visit the guide, business negotiations. Yong Wei mold steel expect to be your long term partner!