Plastic mold steel is divided into pre-hardened ordinary plastic mold steel, pre-hardened high quality plastic mold steel, pre-hardened high hardness plastic mold steel, pre-hardened anti-rot mirror plastic mold steel, anti-rot mirror plastic mold steel, etc.
Die in the work to withstand very large compressive stress and friction, the mold is required to be able to maintain its size and precision under the strong friction. The wear of mold is mainly mechanical wear, oxidation wear and melt wear.
Good hardness, strength, wear resistance, thermal stability and corrosion resistance are required. Ensure the uniform distribution of carbides in steel. Also requires a good process, such as heat treatment deformation small, good corrosion resistance, good processing performance, good grinding and polishing performance, good repair welding performance, high roughness, good thermal conductivity, working size stability. In general, hot die steel can be used for injection forming or extrusion forming. Cold die steel can be used for thermosetting and high wear resistance and high strength moulds.