Method of manufacturing marine shape steel having excellent corrosion resistance

    公开(公告)号:JP5365187B2

    公开(公告)日:2013-12-11

    申请号:JP2008332262

    申请日:2008-12-26

    Abstract: PROBLEM TO BE SOLVED: To provide a shape steel for a vessel exhibiting excellent corrosion resistance without depending on the surface conditions of the steel even in a severe using condition such as the ballast tank of a vessel and having YP of ≥390 MPa. SOLUTION: The shape steel is obtained by subjecting a steel stock containing 0.03 to 0.25% C, 0.05 to 0.50% Si, 0.1 to 2.0% Mn, ≤0.025% P, ≤0.01% S, 0.005 to 0.10% Al, 0.01 to 1.0% W, 0.01 to 3 temperature or below is 10 to 80%, and a finish rolling temperature is controlled to the range of an Ar 3 temperature-30°C to an Ar 3 temperature-80°C, and subsequently performing accelerated cooling from an Ar 3 temperature-30°C to an Ar 3 temperature-100°C to 700 to 500°C. COPYRIGHT: (C)2010,JPO&INPIT

Patent Agency Ranking