When the mould is used, the working conditions of the moulds are very wide, and the working conditions of the various moulds are very different. Therefore, the material for manufacturing the moulds has a wide range, and the application of the mould materials in the mould materials is a mould steel. From general carbon structural steel, carbon tool steel, alloy structural steel, alloy tool steel, spring steel, high speed tool steel, stainless heat resistant steel to maraging steel and powder high speed steel for special moulds, Powder high alloy mould steel, etc. Die steel can be generally divided into three categories: cold work die steel, hot work die steel and plastic die steel.
Cold work die steel
Cold work die steel is mainly used to manufacture moulds for press forming workpieces in a cold state. Such as: cold blanking die, cold stamping die, cold drawing die, imprinting die, cold extrusion die, thread pressing die and powder pressing die. Cold work die steels range from a wide range of carbon tool steels, alloy tool steels, high speed tool steels to powder high speed tool steels and powder high alloy die steels.
Hot work die steel
Hot work die steel is mainly used to manufacture moulds for press working on workpieces at high temperatures. Such as: hot forging die, hot extrusion die, die-casting die, hot upsetting die, etc. Commonly used hot work die steels are: medium and high carbon content alloy mould steels with alloying elements such as Cr, W, Mo, V; special hot work die steels, sometimes made of high alloy austenitic heat resistant die steel .
Plastic mould steel
Due to the variety of plastics, the requirements for plastic products vary widely, and various performance requirements are also imposed on the materials used to make plastic moulds. Therefore, many industrially developed countries have formed a wide range of plastic mould steel series. Including carbon structural steel, carburized plastic mould steel, pre-hardened plastic mould steel, age-hardening plastic mould steel, corrosion-resistant plastic mould steel, easy-cut plastic mould steel, integral hardened plastic mould steel, martensite Aging steel and plastic mould steel for mirror polishing.
Non-magnetic die steel
Non-magnetic die steel is a high-manganese vanadium-based die steel that maintains stable austenite under various conditions, has a very low magnetic permeability, high hardness and strength, and good wear resistance. After high proper solid solution plus aging treatment, it has better comprehensive performance. Good physical properties, high toughness, high work hardening tendency, large thermal expansion coefficient, high electrical resistivity, low thermal conductivity and low magnetic properties. It has a wide range of applications in non-magnetic buildings, non-magnetic machinery, mineral processing equipment and military.