Are you clear about the categorization of die steel?

Mold steel can be divided into three categories: cold rolled mold steel, hot tie mold steel and plastic mold steel, used for calcining, stamping mold, cutting type, aluminum die-casting, etc.. Because the main use of various kinds of molds are different, the work in the standard is complicated, so the steel for molds, according to its production and manufacturing mold work in the standard, should have high strength, compressive strength, wear resistance, sufficient ductility, and its high cutting performance, hardening force and other processing process performance. Because of this main use is different, work standard is complex, the performance requirements of the mold steel is also different.

    Cold rolled dies contain cold stamping, wire drawing dies, deep drawing dies, press models, wire rolling dies, rolling plates, cold extrusion dies and hot forging dies, etc. Cold tooling steel, according to its production and manufacturing tooling work in the standard, should have high strength, compressive strength, wear resistance, sufficient ductility, and its high cutting performance, hardening force and other processing process performance. The main use of such a special tool steel for aluminum alloy is generally classified as a high carbon steel carbon steel, carbon mass fraction of 0.80 percent above, chromium is the key element of this steel, its mass fraction is generally not more than 5 percent. Mass fraction is also very high, up to 2.0 ~ 2.3%. Cold tool steel carbon composition is higher, the vast majority of its institutions are classified as over-eutectic steel or Leydenite steel. Common steel categories are high carbon steel high alloy steel, high carbon steel high manganese steel, molybdenum steel, medium carbon chromium tungsten cushion steel, etc.

    Hot tie die is divided into hammer forging, free forging, extrusion molding and aluminum die casting several key categories, including hot forging die, press forging die, stamping die, cold extrusion die and metal material die casting die. Hot deformation die work in addition to bear great mechanical equipment ground stress, but also to bear constantly encounter heat and cooling effect, and cause a very large internal stress. Hot work mold steel should have high strength, compressive strength, red force, wear resistance and ductility, but also should have excellent high temperature compressive strength, thermal fatigue reliability, heat transfer and corrosion resistance, in addition to the provisions of a high cutting performance, in order to * all cross-section with consistent structural mechanical properties. For die-casting mold steel, it should also have the surface after continuous heating and cooling without cracking, and can withstand the impact and corrosion of shape memory alloy flow. The steel generally belongs to the medium carbon steel, carbon mass fraction of 0.30 ~ 0.60, belongs to sub-eutectic, some steel due to the addition of many aluminum alloy elements (tungsten, molybdenum, vanadium, etc.) and become eutectic or over-analysis steel. Common steel types are chromium alloy steel, chromium-nickel steel, chromium-tungsten steel materials, etc.

    Plastic molds contain thermosetting plastic molds and polyurethane elastomer molds. Steel for plastic molds is required to have certain properties such as compressive strength, strength, wear resistance, heat resistance and corrosion resistance. In addition, also provides excellent process performance, such as heat treatment process deformation is small, good production processing performance, good corrosion resistance, grinding and polishing performance, good welding performance, high surface roughness, good heat transfer and work in the standard specifications and look smooth, etc.. Under general conditions, injection molding or extrusion molding forming dies can be used hot work mold steel; thermosetting plastic forming and the provisions of super wear-resistant, high toughness mold can be used cold work mold steel.