HIGH HARDNESS MARTENSITIC STAINLESS STEEL WITH EXCELLENT ANTIBACTERIAL PROPERTY AND PREPARATION METHOD THEREFOR

摘要

A high hardness martensitic stainless steel with excellent antibacterial property and a preparation method therefor are disclosed. The disclosed high hardness martensitic stainless steel with excellent antibacterial property comprises: 0.45 0.65 wt% of C; 0.02 0.06 wt% of N; 0.1 0.6 wt% of Si; 0.3 1.0 wt% of Mn; 0.1 0.4 wt% of Ni; 13 14.5 wt% of Cr; 0.4 0.6 wt% of Mo; 0.8 1.2 wt% of W; 1.5 2.0 wt% of Cu; and the balance of Fe and inevitable impurities. According to the present invention there is an advantage enabling the preparation of the martensitic stainless steel for knives the martensitic stainless steel having high hardness high corrosion resistance and excellent antibacterial property by uniformly distributing fine chromium carbide and e Cu precipitates in the microstructure of a batch annealed material of a high carbon martensitic stainless steel containing Cu. In addition according to the present invention there is an advantage of causing no rust formation on a material after an antibacterial evaluation.