高温で長時間使用した蒸気タービンケーシングおよびロータ材の機械的性質

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タイトル別名
  • Mechanical Properties of Casing and Rotor Steels after Long-Term Service in Steam Turbine
  • コウオン デ チョウジカン シヨウシタ ジョウキ タービン ケーシング オヨビ

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抄録

Mechanical properties of steam turbine casing and rotor materials serviced for 13 years were investigated. The results obtained are summarized as follows.<br>(1) The creep rupture strength of the materials used in steam at 538°C showed a little decrease.<br>(2) The value of KIc of the rotor material used at 480°C was 65% of that of the same material used at 70°C.<br>(3) Embrittlement during service occurred at 400∼522°C, but not below 300°C. It is considered that the main factor of embrittlement is the segregation of impurities such as phosphor to the grain boundary.<br>(4) The FATT of embrittled materials was recovered by the de-embrittle treatment at 650°C.

収録刊行物

  • 材料

    材料 33 (366), 298-303, 1984

    公益社団法人 日本材料学会

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