Yong Wei mold steel imports XW-41_ _ Wanzhou XW-41 provided by Yong Wei steel mold. We are Dongguan City An Yongwei mold steel shop (www.dgyongwei.com) located: Dongguan, Guangdong specializes in: mold steel, DC53, SKD11.SUS440C, SUS420 shoddy steel material containing impurities, the density of steel is small, but super-size difference so serious in the case of the absence of a vernier caliper, check that it can be weighed. For example, for rebar 20 XW-41 tool steel, the national standards set forth in the most negative tolerance of 5%, when a single length 9M its theoretical weight of 120 kg, its minimum weight should be: 120X (L-5% ) = 114 kg, weighing out the actual weight of 114 kg single smaller than it is shoddy steel, because it exceeded the 5% negative tolerance. PVD is divided into a vacuum deposition, sputtering and ion plating. Ion plating is a combination of vapor deposition and sputtering techniques, ion plating has a strong adhesion force, are good throwing power, the base material to be plated and plating materials can be widely with other advantages, to thereby obtain a wider range of applications. In recent years, multi-arc ion plating people's attention. At present, more in the mold used is ion plating TiN, this film is not only high hardness and good toughness film, combined with strong, high temperature. Multiple TiN film developed on the basis of such (TiAl) N, (TiCr) N, the performance is better than TiN XW-41, is a class of more promising new film. 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 to 2015, the average annual growth rate of China's mold industry will XW-41 wholesalers at about 10%, at around 8% in 2015 ~ 2020. 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.