Effects of W on Mechanical Properties and Microstructure of a Highstrength 9% Cr Heat Resisting Steel

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Other Title
  • 高強度9Cr耐熱鋼の機械的性質及び微細組織に及ぼすWの影響
  • コウ キョウド 9Cr タイネツ コウ ノ キカイテキ セイシツ オヨビ ビサ

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Abstract

The change of mechanical properties and microstructure has been investigated by substituting W for a part of Mo in a 9% chromium heat-resisting steel.<BR>Substituting W for a part of Mo has little effect on tensile and impact properties at room temperature as well as creep rupture strength at under 600°C, but shows benefitial effects on long-term creep rupture strength at above 650°C. This is related to the fact that the substitution reduces the coarsening tendecy of precipitates and inhibits the formation of M6C which is considered detrimental to elevated temperature strength.

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 73 (8), 1034-1040, 1987

    The Iron and Steel Institute of Japan

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