Network optimisation information.
In order to improve the cold working performance of die steel, since the 1930s, people began to study the addition of S, Pb, Ca, Te and other easy-cutting processing elements or graphitized elements in die steel, thus developing a variety of easy-cutting die steel to further improve its cutting performance and grinding performance, reduce tool grinding losses and lower processing costs.
Hardening and hardenability.
The degree of hardening depends mainly on the chemical composition of the steel and the state of the original organisation before quenching, while the degree of hardening depends mainly on the carbon content of the steel. For most cold-worked tool steels, hardening is often an important consideration. For hot work mould steels and plastic mould steels, the general size of the mould is relatively large, especially when making large moulds where hardenability is particularly important. In addition, for a variety of complex shapes and susceptible to heat treatment deformation of the mold, in order to reduce quenching deformation, p20 ingot often use a poor cooling capacity of the quenching medium, such as air cooling, oil cooling or salt bath, etc., to obtain the required hardness and depth of hardened layer, it is necessary to use a good hardening of the mold steel.
