In recent years, with the rapid development of China mold and die industry, for the domestic steel provides a huge market, led to the domestic steel output, varieties, specifications and quality standards.China's metallurgical industry has developed and introduced a large number of kinds of steel needed by the mould industry, but it is still difficult for domestic mould steel to meet the demands of the domestic mould market in both variety and quality.
Take cold mould steel as an example. At present, there are only cr12, cr12mov and CRWMN steel in China.The content of molybdenum and vanadium in cr12mov steel in China is lower than that of d2 steel.CRWMN has a high carbon content and does not contain vanadium. It is easy to produce serious reticular carbide, which will affect its performance.According to the development trend of cold stamping parts to high precision and standardization, high performance die steel has been developed in foreign countries.Flame hardened steel sx10570l;Hollow quenched microdeformed steel a4, etc.These new mould steel is also in urgent need of development in China.
There is also a gap between domestic hot-working die steels. Currently, there are only 2 steel Numbers in China's general section steels.In addition to the general steel type, new yhd3, h26 and other varieties have been developed in foreign countries.The plastic mold steel gap is greater.In terms of varieties, the national standard is only 1 steel number, while the United States has 7 steel Numbers, and a relatively complete series of steel used.