STAINLESS STEEL EXCELLENT IN ANTIBACTERIAL PROPERTY AND DESIGNING PROPERTY

摘要

PROBLEM TO BE SOLVED: To form an oxidized film for coloring on a stainless steel surface without deteriorating antibacterial properties of which Cu-enriched phases impart. ;SOLUTION: This stainless steel is the one contg., by weight, 0.8% C, ≤3% Si, ≤15% Mn, 10 to 30% Cr, ≤15% Ni and 0.4 to 5.0% Cu, in which secondary phases essentially consisting of Cu are dispersed into the matrix in the ratio of 0.2vol.% and an oxidized film having ≤200nm thickness is formed by heat treatment at ≤900°C. Moreover, the stainless steel may contain one or ≥ two kinds among 0.02 to 1% Nb, 0.02 to 1% Ti, ≤3% Mo, ≤1% Al, ≤1% Zr, ≤1% V, ≤0.05% B and ≤0.05% rare earth elements(REM).;COPYRIGHT: (C)1997,JPO