改良型ＨＰ系耐熱鋳鋼の経年使用材の補修溶接割れ　１　　小型スポットバレストレイン試験による高温割れ感受性評価

DOI

書誌事項

タイトル別名
  • Evaluation of Hot-Cracking Susceptibility by Miniature Spot-Varestraint Testing. Repair Weld Cracking of Long Term Exposed HP-Modified Heat-Resisting Cast Alloys. (Report 1).
  • Repair Weld Cracking of Long Term Exposed HP-Modified Heat-Resisting Cast Alloys (Report 1)
  • 改良型HP系耐熱鋳鋼の経年使用材の補修溶接割れ(第1報)

抄録

The hot cracking susceptibilities of HP-modified heat-resisting cast alloys exposed at the elevated temperature for the long term were evaluated by the miniature spot-Varestraint testing. The as-cast, aging and/or used (service exposed) specimens of seven types of the HP-modified alloys were employed for the spot-Varestraint testing. Ductility-dip cracking as well as liquation cracking was occurred in HAZ of each specimen after the spot-Varestraint testing. The ductility-dip cracking susceptibilities of alloys except for HP43AZ much increased in aged and used conditions compared with as-cast condition, while the liquation cracking susceptibilities did not change so much during long term aging. The ductility-dip cracking susceptibility of HP43AZ containing zirconium was remarkably restrained even in used condition. It was deduced that the improvement in the ductility-dip cracking susceptibility of HP43AZ was attributed to reducing the occupied ratio of microconstituents on cellular dendrite boundary by the zirconium addition which possessed refinement effect of dendritic cell.

収録刊行物

キーワード

詳細情報 詳細情報について

  • CRID
    1390282679698887296
  • NII論文ID
    130003764643
  • DOI
    10.2207/qjjws.18.438
  • ISSN
    24348252
    02884771
  • 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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