| 摘要 |
PROBLEM TO BE SOLVED: To produce a cast steel for heat treatment, capable of securing superior mechanical strength, particularly hardness and toughness, excellent in weldability, and improved in castability required of a casting. SOLUTION: This cast steel has a composition consisting of, by weight, 0.3-0.65% C, 0.1-2.1% Si, 0.1-1.2% Mn, 4.5-12.0% Cr, 0.35-3.3% Mo, 0.05-1.4% V, and the balance Fe with inevitable impurities. Further, the value Z of an eutectic value represented by equation Z=8×(C%)+0.6 (Cr%) is regulated to <=10.8.
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