| 摘要 |
PROBLEM TO BE SOLVED: To obtain stainless steel excellent in workability and toughness by allowing it to have a compsn. composed of specified mass ratios of C, Si, Mn, P, S, Cr, Ti, Al, N, O(oxygen), V, Cu, Ni, Mo, Nb, Mg, Ca, and the balance Fe with inevitable impurities and allowing composite inclusions of Al base inclusions and Ti base inclusions having specified sizes to be dispersed into the steel. SOLUTION: This ferritic stainless steel is the one having a chemical compsn. contg., by mass, <=0.015% C, 0.01 to 1.0% Si, <=1.0% Mn, <=0.04% P, <=0.02% S, 16 to 32% Cr, 0.003 to 0.3% Ti, 0.001 to 0.15% Al, 0.003 to 0.015% N, 0.001 to 0.006% O(oxygen), <=0.15% V, <=0.6% Cu, <=0.3% Ni, <=5% Mo, <=0.4% Nb, <=0.003% Mg, <=0.003% Ca, and the balance Fe with inevitable impurities, in which composite inclusions of Al base inclusions and Ti base inclusions each having 0.3 to 5μm particle size are dispersed into the steel.
|
