２４Ｃｒ‐２４Ｎｉ‐１．５Ｎｂ系鉄基耐熱合金の溶接割れに関する研究　ＩＩ　　２４Ｃｒ‐２４Ｎｉ‐１．５Ｎｂ系鉄基耐熱合金の液化割れ感受性に及ぼすＮｂ／Ｃの影響

DOI

書誌事項

タイトル別名
  • Effect of Nb/C on the Sensitivity of Liquation Cracking in 24Cr-24Ni-1.5Nb Fe-base Heat Resisting Alloy
  • 24Cr-24Ni-1.5Nb系鉄基耐熱合金の溶接割れに関する研究(第2報)

抄録

In this study, the effect of Nb/C on the sensitivity of liquation cracking of 24Cr-24Ni-1.5Nb Fe-base heat resisting alloy (IN-519) was researched at first. Then, metallurgical inspections on various phases at grain boundaries were conducted. Solidification phenomena of this alloy were also examined. The main results obtained in this experiment are as follows;<BR>1) The sensitivity of liquation cracking of this alloy becomes minimum when the value of Nb/C is about 1.0. Its sensitivity increases in the case of Nb/C value decreasing less than about 1.0 or increasing more than about 1.0. When Nb/C value decreases less than about 1.0, Cr carbide-r solid solution eutectics are formed at grain boundaries besides NbC-r solid solution eutectics. As the solidification temperature of Cr carbide-r solid solution eutectic is lower compared with that of NbC-r solid solution eutectic, the solidification cracking sensitivity increases. When Nb/C value increases more than about 1.0, Laves phase-r solid solution eutectics of which solidification temperatures are lower than those of NbC eutectics, are formed at grain boundaries. So, the sensitivity of liquation cracking of this alloy increases again.<BR>2) To improve the resistivity to liquation cracking of this alloy, increasing Nb content and decreasing C content are very effective.

収録刊行物

  • 溶接学会誌

    溶接学会誌 51 (12), 989-995, 1982

    一般社団法人 溶接学会

キーワード

詳細情報 詳細情報について

  • CRID
    1390282681475784064
  • NII論文ID
    130003763621
  • DOI
    10.2207/qjjws1943.51.989
  • ISSN
    18837204
    00214787
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
    • Crossref
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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