Mn鋼の急冷状態におけるε相生成範囲

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タイトル別名
  • ε Phase Formation Range in Quenched Manganese Steels
  • Mn コウ ノ キュウレイ ジョウタイ ニ オケル イプシロンソウ セイセイ ハンイ
  • ε Phase Formation Range in Quenched Manganese Steels

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The ε phase formation range of various composition of quenched manganese steels has been investigated by dilatation test, magnetic test, and X-ray analysis. Transitional composition steels that the structure under quenched conditions were changed from simple α phase to simple γ phase has been shown two clear expantion at about 200°C and 500°C in thermal dilatation curves. Hitherto these phenomena considered that the retained austenite in steels were transformed to α at these two temperature ranges as same manner as Cr steels, but, in this work, a few anomalies were observed in the expantion at about 200°C in dilatation curves. Consequently, it was found that this expansion due to not only the simple retained austenite transformation, but the ε→γ transformation only, or the retained austenite transformation coincide with the ε→γ transformation. Steels, composition of 1%C and 2∼3%Mn, has been shown the two step transformation of retained austenite in both dilatation and magnetic curves, and on lowering the manganese content the steels has been transformed as same as plain carbon steel, and on increasing the manganese content the steels has been transformed only at higher temperature range. Manganese content that formed ε phase in quenched Fe-Mn alloys has gradually lowered with the increase of C content in steels, and its content ranges has changed to the narrow range by increasing carbon content, then, ε phase were formed in quenched conditions of 1, 0%C and 3∼4%Mn steels.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 27 (8), 376-382, 1963

    公益社団法人 日本金属学会

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