高Mn-V系非〓性工具鋼の基礎特性について

概要

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High Mn-V type non-magnetic tool steel with high hardness has been invesitgated on the age-hardening behavior, mechanical and magnetic properties, and resistance to wear and heat check. By aging after solution treatment, the hardness increases remarkably with precipitation of vanadium carbide to about HRC45. In this case, Charpy impact value of about 3kg·m/cm2 can be obtained. Aging hardness increases with increasing contents of carbon, vanadium and molybdenum, and decreases by adding cobalt. Preliminary cold-working raises the hardness without decreasing of toughness, and non-magnetic property is kept. Strengths at elevated temperatures are greater than those of hot-work tool steel AISI-H19, and ductility and toughness are smaller. Regarding resistance to wear this steel is superior to H19, and regarding resistance to heat check inferior slightly.
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