| 摘要 |
PURPOSE:To obtain a low-cost wear resistant steel sheet having satisfactory weldability by subjecting a steel having a prescribed composition contg. restricted amounts of C, Cr and Mo which deteriorate weldability to quenching and tempering under specified conditions. CONSTITUTION:A steel consisting of 0.10-0.19% C, 0.05-0.55% Si, 0.90-1.60% Mn and the balance Fe and having 0.35-0.44% Ceq represented by the formula is prepd. The steel is hot rolled, quenched directly from 950-850 deg.C or quenched after reheating to 900-950 deg.C and tempered at 300-500 deg.C. Thus, a wear resistant steel sheet having superior bendability and causing no weld crack is obtd. The steel sheet is suitable for construction and transfer machinery such as a power shovel.
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