水車ランナー用 17Cr-5Ni-1Mo 鋳鋼の耐食性と機械的性質

概要

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In order to develop a new hydraulic runner casting with a good corrosion resistance, studies have been carried out on some properties of several Cr-Ni martensitic stainless cast steels. The properties of a partial model runner casting of the developed 17Cr-5Ni-1Mo steel were investigated. The results are as follows. 1. Internal quality of this casting is superior and comparable with that of 13Cr-Ni type casting in terms of cavity and macrosegregation. 2. Excellent corrosion resistance is performed by higher chromium content and 1% molybdenum addition. 3. Charpy impact properties are almost same as those of 13Cr-1Ni casting. This is attributed to delta ferrite. 4. Enhanced fatigue strength stems from higher corrosion resistance and tensile strength. 5. This casting also possesses good weldability.
社団法人日本鉄鋼協会の論文
1984-06-01