Including Die, drawing dies, drawing die, pressure die, thread rolling die, plate rolling, cold heading and cold extrusion die molds. Cold mold steel, according to its manufacturer with the working conditions, should have high hardness, strength, wear resistance, sufficient toughness, and high hardenability, hardened and other process performance. For such uses are generally high-carbon alloy tool steel alloy steel, carbon mass fraction of 0.80%, and chromium is such an important alloying elements of steel, its mass fraction is usually not more than 5%. But for some very demanding wear resistance, mold steel after quenching deformation is small, the maximum mass fraction of up to 13% chromium, and in order to form a large number of carbide, steel, carbon mass fraction is also high, up to 2.0% 2.3 percent. Cold work die steel high carbon content, the majority belong to the organization eutectoid steel or ledeburite steel. Commonly used class of high-carbon low-alloy steel, high carbon high chromium steel, chromium molybdenum steel, chromium-tungsten-chuan of carbon steel. [Applications]: cold-working die for the cold state (temperature less than 200 ~ 300 ℃) of metal forming, such as Die, cold extrusion, shear modulus and so on. Type of mold under great pressure, intense friction and some impact, therefore, requires a high hardness, wear resistance and sufficient toughness. In addition, the shape of the complex, sophisticated, large-scale mold also requires a high hardenability and heat treatment of small deformation.
[Chemical composition]: generally have a high carbon content, wC = 1.0% ~ 2.0%, to obtain high hardness and high wear resistance. Adding alloying elements Cr, Mo, W, V, etc., in order to improve wear resistance, hardenability and resistance to tempering resistance.
[Chemical composition]: generally have a high carbon content, wC = 1.0% ~ 2.0%, to obtain high hardness and high wear resistance. Adding alloying elements Cr, Mo, W, V, etc., in order to improve wear resistance, hardenability and resistance to tempering resistance.
