高Mn鋼の溶体化処理状態の相関係および加工による相変化におよぼすCの影響

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タイトル別名
  • Effect of Carbon on the Phase Relations of High-Manganese Steels, Solution-Treated, and then Cold Worked
  • コウMn コウ ノ ヨウタイカ ショリ ジョウタイ ノ ソウカンガカリ オヨビ カコウ ニ ヨル ソウヘンカ ニ オヨボス C ノ エイキョウ

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抄録

The phase relations in solution treated Fe-C-Mn alloys containing about 12%Mn, 0∼1.2%C, and the phase transformations of these alloys by cold-working were studied mainly by thermal dilatation methods. The results obtained were as follows: α phase in solution-treated 12% manganese steels sharply decreased by addition of carbon and disappeared by addition of about 0.6%C. On the other hand, ε phase evidently increased by addition of carbon and has rose to the max. volume % at about 0.2%C, then gradually decreased with increase of carbon content and disappeared by addition of about 0.7%C. By cold-working, α phase in these alloys remarkably increased, but disappeared when the C content rose to 0.8%, while the max. volume of ε phase decreased and the C content at which the max. of ε phase was formed moved to the higher carbon range, and also the appearing range of ε phase extended to the higher carbon side. In these alloys, it seems that the phase transformation γ→ε→α occured by cold-working. It may be recognized that ε phase were formed in practically work-hardened Hadfield steel, but the volume of it may be little. As ε is the metastable phase which appears as intermediate state of γ→α transformation process in Fe-Mn alloys, the effect of carbon on the formation of ε phase in solution-treated high manganese steels varies by the compositions of steels which control the stability of γ phase.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 26 (5), 283-287, 1962

    公益社団法人 日本金属学会

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