15-5PHステンレス鋼に関する基礎実験

概要

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Essential data available for processing 15-5PH stainless steel were derived from the investigation over three experimental heats.These are as follows:(1) Amount of δ-ferrite in ingots varies not only with nominal composition, but also with location, that is inner contains more.(2) Solution treatment at higher temperature results in lower Ms point. In the case of heat, which shows lower Ms point, martensitic transformation progresses isothermally at room temperature.(3) Ingots or billets should be hot-worked in the range of 1200°C to 1000°C. Soaking and pre-working improve forgiability significantly.(4) Slower cooling in solution treatment or/and aging practices does not deteriorate Charpy impact values of aged materials.(5) Three heats exhibit excellent resistance to stress-corrosion cracking under 0.1N-HCl drops.
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