| 摘要 |
PROBLEM TO BE SOLVED: To provide martensitic stainless steel for stably feeding an inexpensive engine gasket of high performance in which high strength, workability and corrosion resistance are secured by finishing as-quenched. SOLUTION: The compsn. of this steel is composed of 0.1 to 0.3% C+N, <=0.5% Si, <=0.7% Mn, 10 to 17% Cr and 0 to 0.6% Ni. Its structure is composed of 40 to 80% martensitic phases, and the balance ferritic phases. Its hardness is controlled to 300 to 500 by Vickers hardness. As to the production, it is worked to a prescribed thickness and is thereafter finished by quenching from 850 to 1000 deg.C.
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