| 摘要 |
PROBLEM TO BE SOLVED: To provide an iron casting that is an alloyed cast iron free of W, Ni, Co, Nb and the like, hardly causes a quenching crack, shows a prescribed high hardness and is excellent in wear resistance due to the presence of a large amount of martensite structure and a small amount of retained austenite, without performing tempering for a plurality of times, and is suitable for a thick iron casting, and a method for manufacturing the same.SOLUTION: An iron casting has a composition comprising, by wt.%, 1.0-2.5% C, 0.2-1.5% Si, 0.2-1.5% Mn, 5.0-9.0% Cr, 0.8-2.5% Mo, 0.1-0.7% V and the balance being Fe, has a structure wherein martensite phase occupies ≥80% of a base and metal carbides are dispersed, and has a hardness of ≥74 Hs. |
