| 摘要 |
<p>PURPOSE:To obtain stainless steel having superior fatigue strength in water by using stainless steel composed of a specified wt.% each of C, Si, Mn, Cr, Ni, Co, Mo and V and the balance Fe. CONSTITUTION:Martensitic stainless steel is composed of, by weight, 0.01-0.1% C, 0.1-1.5% Si, 0.1-2.0% Mn, 12-17% Cr, 3-7% Ni, 0.1-3% Co, 0.1-2.0% Mo, 0.05-0.5% V and the balance Fe with inevitable impurities or 0.0005-0.01% B is further incorporated. The amt. of retained austenite is regulated to <=20vol.% and that of delta-ferrite to <=15% by area. A material suitable for runners, guide vanes, etc., for the generation of electricity is obtd.</p> |
