P20 and SKD11 mold steel
First, sufficient strength, wear resistance, sufficient hardened layer and strength, toughness, surface hardness and the like.
Although it is not required to be as high as a cold work die, it should meet the requirements for use.
Second, the cold and hot processing performance is good, the surface roughness value is low, the good mirror polishing performance, the surface pattern etching performance and the corrosion resistance, the heat treatment deformation, the metallographic structure, and the mold size are stable.
It has high-temperature strength, toughness, hardness and wear resistance, and has high tempering stability and excellent heat fatigue resistance. High hardenability to ensure that the mechanical properties of the entire section are basically the same.
The reason for the high hardening is that it contains about 1.1% of C carbon, so it can be hardened to HRC63 in heat treatment, and it is greatly improved by adding many other elements such as chromium, molybdenum, vanadium, cobalt, etc. P20, SKD11 Hardenability of die steel.
Excellent thermal conductivity, so that heat can be transmitted out as quickly as possible to avoid excessive cavity temperature. Good oxidation resistance.