Cr-Ni-Mo合金の時効硬化について

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タイトル別名
  • Age-Hardening of Cr-Ni-Mo Alloys
  • Cr-Ni-Mo ゴウキン ノ ジコウ コウカ ニ ツイテ

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This paper presents data of age-hardening of Cr-Ni-Mo alloys containing 35 to 60%Cr at 600° to 1000°C. The raw materials used were Cr produced by electrolysis of chromic acid and high grade Ni and Mo. All specimens were prepared in water-cooled Cu crucible under argon atomosphere by means of arc-melting. The results were as follows: Most of the 35 to 50%Cr alloys show marked age-hardening caused by the precipitation of Cr α and σ phase, but the 60%Cr alloys exhibit age-softening which is due to the decomposition of β or α′ phase. (2) This age-hardening is effective for the rise of hardness at high temperature, while the existence of  or α′ phase seems to lead to the decrease of hardness at high temperature, in spite of its extreme hard structure at room temperature. (3) The hardness at high temperature increases with increase of Mo and Cr contents after 500 hr aging.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 23 (7), 363-366, 1959

    公益社団法人 日本金属学会

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