| 摘要 |
<p>PURPOSE:To produce a high strength stainless steel wire excellent in toughness by subjecting a hot rolled wire rod of a martensitic stainless steel having a specific composition consisting of C, Cr, Mo, P, S, and Fe to specific wiredrawing and heat treatment. CONSTITUTION:Preliminary wiredrawing is applied at 20-50% reduction of area to a hot rolled wire rod of a martensitic stainless steel having a composition consisting of, by weight, <0.15% C, 11.50-14.00% Cr, 0.60-1.20% Mo, <0.04% P, <0.03% S, and the balance Fe with inevitable impurities. The resulting wire rod is heated rapidly to a temp. of the A3 point or above, preferably to 1000-1050 deg.C and is then cooled rapidly down to a temp. right under the Ms point, preferably 250-280 deg.C, and held for a short time, by which the resulting martensitic interface is stabilized. Subsequently, this wire is heated and held at a temp. in the two phase region of ferrite and austenite, preferably at 875-920 deg.C, subjected to oil quenching treatment, and further subjected to low temp. tempering treatment. Then, wiredrawing treatment is applied to the wire at >=50% reduction of area. By this method, the high strength 13Cr series stainless steel wire having high toughness as well as corrosion resistance and heat resistance can be obtained.</p> |
