SUS304LおよびSUS316Lステンレス鋼の極低温引張性質に及ぼす窒素の影響

概要

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The effect of nitrogen content on tensile properties of SUS304L with N content less than 0.21%and SUS316L less than 0.23%have been investigated at cryogenic temperatures and the following conclusions were obtained. (1) Complicated temperature dependence of 0.2010 proof stress appeared in the range of lower N content in the temperature range from 220K to 77K This phenomenon is probably caused by the stress induced e matensitic transformation. (2) The increase of 0.2% proof stress with Ncontent at 4K was larger than that with C content. (3) Work hardening was prominent in steels with lower N content and at lower temperatures. This is attributed to instability of austenite. (4) An elongation peak appeared slightly below the upper limit temperature of stress induced α' martensitic transformation.
社団法人日本材料学会の論文
1991-02-15