フェライト系耐熱鋼の母材および溶接継手のクリープ疲労寿命特性

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タイトル別名
  • Creep-fatigue Properties for Base Metals and Welded Joints of Ferritic Heat-resisting Materials
  • 力学特性 フェライト系耐熱鋼の母材および溶接継手のクリープ疲労寿命特性
  • リキガク トクセイ フェライトケイ タイネツ コウ ノ ボザイ オヨビ ヨウセツ ツギテ ノ クリープ ヒロウ ジュミョウ トクセイ

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Ferritic heat-resisting steels are planned to be applied to ultra supercritical power plants. In this study, creep-fatigue properties for base metals such as Mod.9Cr-1Mo, 9Cr-2W, 12Cr-2W, newly produced Pd-added ferritic steel and oxide dispersion strengthened ferritic steels and for welded joints of two kinds of the ferritic steels were investigated.<BR>The creep-fatigue lives of the base metals, tested by trapezoidal strain wave shape with 3 hr-hold at tension side, were dependent on the kind of the materials and had a good correlation with the reduction of area for each material in the creep rupture tests.<BR>The creep-fatigue lives for welded joint of 12Cr-2W and 9Cr-2W steel plates were about 70%, compared with the base metals.<BR>The welded joints were fractured at fine-grained HAZ (heat affected zone).

収録刊行物

  • 鉄と鋼

    鉄と鋼 87 (7), 508-514, 2001

    一般社団法人 日本鉄鋼協会

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