3.5 GPa級マルエージング鋼実用上の二，三の問題

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  • 尹 鐘大
    ハルビン工業大学，現在：東北大学研究生
  • 須藤 一
    東北大学工学部金属材料工学科

書誌事項

タイトル別名
  • Some Problems on the Practical Use of a 3.5 GPa Grade Maraging Steel
  • 3 5GPaキュウ マルエージング コウ ジツヨウジョウ ノ ニ サン ノ モ

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抄録

In a previous paper, it was reported that the Miharisin’s 3.5 GPa grade maraging steel (8%Ni-14%Mo-18%Co-bal. Fe) had excellent fatigue strength, when it was prepared by a special basic melting and was subjected to thermomechanical treatments followed by cold rolling. In the present work, some problems on the practical use of this steel, that is, mechanical anisotropy, hydrogen embrittlement and the strength of welded joint were examined. The results are as follows:<BR>The typical texture as a BCC metal was developed by cold rolling, but the mechanical anisotropy was not so distinct. The conventionally heat treated steel is very sensitive to hydrogen embrittlement, but the cold rolling before age-hardening was effective to mitigate the embrittlement. Electron beam welding reduced the tensile strength from 3.5 GPa to 3.0 GPa, but it is recommended as an available welding process for this steel. The structures of weld metal and heat affected zones were observed by means of transmission electron microscopy.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 47 (7), 590-596, 1983

    公益社団法人 日本金属学会

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