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 Mold steel profile 



 Die steel can be divided into (cold-working die steel), (hot work die steel) and (plastic mold steel) Class 3, for forging, stamping, cutting type, die-casting and so on. Use a variety of different molds, working conditions are very complex, so the steel mold, the mold according to the working conditions of its manufacture, should have high hardness, strength, wear resistance, sufficient toughness, and high hardenability, quenching rigid and process performance. Because of these different uses, working conditions are very complex, so the performance requirements of steel molds are also different. 
 Including cold-working die Die, drawing dies, drawing die, pressure die, thread rolling die, plate rolling, cold heading and cold extrusion die molds. Cold mold steel, according to the manufacturer with the working conditions they should have high hardness, strength, wear resistance, sufficient toughness, and high hardenability, hardening and other process performance. Used for such purposes are generally high-carbon alloy tool steel alloy steel, carbon mass fraction of 0.80 percent, chromium is an important alloying elements such steel, the mass fraction is usually not more than 5%. But for some demanding wear resistance, mold steel after quenching deformation is small, the maximum mass fraction of chromium up to 13%, and in order to form a large number of carbides, the mass fraction of carbon steel is also high, up 2.0% 2.3%. Cold die steel high carbon content, most of the organization are eutectoid steel or ledeburite steel. Commonly used class of high-carbon steel low-alloy steel, high carbon high chrome steel, chrome molybdenum steel, carbon steel, chrome-tungsten-chuan. 
 Hot die forging into, forging, extrusion and casting several main types, including hot forging die, die forging presses, stamping dies, hot extrusion dies and molds for metal casting. Thermal deformation in addition to the mold in the work under enormous mechanical stress, but also to withstand repeated heating and cooling to do with, and cause a lot of thermal stress. Hot work tool steel in addition to high hardness, strength, red hardness, wear resistance and toughness, also has good high temperature strength, thermal stability, fatigue, thermal conductivity and corrosion resistance, also requires a high hardenability to ensure that the entire section with the same mechanical properties. For the die-casting mold of steel, but also with the surface layer after repeated heating and cooling does not produce cracks and withstand the impact of liquid metal flow and erosion performance. These are generally carbon steel alloy steel, carbon mass fraction of 0.30% to 0.60%, are sub-eutectoid steel, also part of the steel alloy as adding more elements (such as tungsten, molybdenum, vanadium, etc.) or a eutectoid eutectoid steel. Commonly used types of steel are chromium-manganese steel, chrome-nickel steel, chromium tungsten steel. 
 Plastic mold plastic mold including thermoplastic and thermoset plastic mold. Plastic mold steel requires a certain amount of strength, hardness, wear resistance, thermal stability and corrosion resistance properties. It also requires a good craft, such as smaller heat treatment, processing performance, good corrosion resistance, grinding and polishing performance, welding performance, high roughness, thermal conductivity and good working conditions and the size and shape of the stability . In general, injection molding or extrusion die can be used hot work tool steel; thermoset shape and require high wear resistance, high strength cold-working die steel molds can be used.