Special quality steel is especially needed in the production process strictly control the quality and performance of steel SKD11 hardness indicator of its quality control, there are provisions in its standard belongs, in representation of the representatives of steel symbol indicates, such as A, E, C, etc., foreign steel quality level is not marked, but marked refining methods used or made some improvement, improvement, as expressed by the ESR ESR; VAR G50; VIM vacuum induction furnace; mod shows some improvement or the like to make. The greater the temperature difference between the inside and outside of the workpiece, and thus is easy to cause thermal stress in the heating process causes deformation. So heated pace of cross-sectional size of the work should also be considered: a large cross-section should be slower; conversely SKD11, a small section of the workpiece, the heating rate can be faster. In the construction steel market, although prices overall still continues to rise, but the increase has been a marked contraction. Shanghai, Jinan and other places t price week rose from 20 to 180 yuan, Tianjin, Shijiazhuang and other places have fell, t price decreases in the 20-70 yuan. Currently, businesses have turned cautious confidence SKD11 price, the market turnover is gradually shrinking. 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 new varieties of mold steel, making domestic hot and cold work die steel reached 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 with an 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. SKD11 manufacturers, nanxiong SKD11, Yong Wei steel mold (View) provided by the 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!