Microstructure and Mechanical Properties of 2 1/4 Cr1Mo and l/2Mo Heat Resisting Steels after Long Service

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概要

• 論文の詳細を見る

• The microstructure and mechanical properties of a 2 1/4Cr 1Mo steel after service in a boiler header for 88,000 hours at 813゜K and of a 1/2Mo steel after service in a chemical plant for 130,000 hours at 623゜K, were studied and compared with those of respective present day commercial virgin steels. It was found that notch toughness was most affected by long service unlike tensile or fatigue properties and that the loss of notch toughness was very severe in the case of the 2 1/4Cr 1Mo steel, but quite small in the 1 1/2Mo steel. Extensive precipitation of coarse carbides during service and segregation of phosphorus appeared to be the causes of a severe embrittlement of the 2 1/4Cr 1Mo steel. It is further shown that simple step cooling of virgin 2 1/4Cr 1MO steel cannot simulate the embrittlement occurring after long service.

• 社団法人溶接学会の論文
• 1983-04-01

著者

• Masumoto Isao

  Dept. Of Metallurgy Faculty Of Engineering Nagoya University

• Shinoda Takeshi

  Dept. Of Metallurgy Faculty Of Engineering Nagoya University

• WIGNARAJAH Sivakurnaran

  Dept. of Metallurgy, Faculty of Engineering, Nagoya University

• YAMADA Shigeharu

  Dept. of Metallurgy, Faculty of Engineering, Nagoya University

• Yamada Shigeharu

  Dept. Of Metallurgy Faculty Of Engineering Nagoya University:mitsubishi Heavy Industries

• Wignarajah Sivakurnaran

  Dept. Of Metallurgy Faculty Of Engineering Nagoya University

関連論文

• Microstructure and Mechanical Properties of 2 1/4 Cr1Mo and l/2Mo Heat Resisting Steels after Long Service

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