Factors affecting the thermal fatigue resistance of steel are mainly: ① steel thermal conductivity. Thermal conductivity, high import DC11 die steel mold surface can reduce the degree of metal is heated, thereby reducing the tendency of the thermal fatigue of steel. Generally believed that thermal conductivity and cooperation related to the amount of carbon steel, high carbon content of the low thermal conductivity when DC11 die steel, hot die steel should not be so high-carbon steel. Commonly used in the production of carbon steel (C0.3% 5 ~ 0.6%) combined carbon content is too low. Causes the decrease in the hardness and strength of steel. Is disadvantageous. Critical point ② Steel. The critical point is usually steel (Acl) is higher. The lower steel thermal fatigue bias. Steel mold steel very tough in the work process, the mold bear the brunt of the load, in order to reduce the use of the process of breaking, chipping and other forms of damage, mold steel requires a certain degree of toughness. Number of factors mold steel chemical composition, grain size, purity, carbides and inclusions, morphology, size and distribution, as well as the microstructure and other heat after heat treatment systems and obtained all die steel-on-steel a great deal of impact toughness. 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, hot and cold performance is not very good, it is necessary to strictly control the process parameters of hot and cold worked to avoid defects and waste. On the other hand, by increasing the purity of steel, to reduce the content of harmful impurities, improve organizational status of the steel, hot and cold worked to improve the properties of the steel, thereby reducing the 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 DC11 prices, 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 price of iron ore, futures premium to the spot market is relatively bearish on behalf of future ore prices, this structure since before iron ore futures on has been formed, and with the continued increase in international iron ore supply, as well as the decline in China's steel output growth, the future of the international iron ore market oversupply situation has been basically formed, futures prices continued premium to the spot also in line with common sense. Yong Wei mold steel | import DC11 Die | New DC11 provided by Yong Wei Ning 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!