Microstructure and Mechanical Properties of 2 1/4 Cr1Mo and l/2Mo Heat Resisting Steels after Long Service :
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- MASUMOTO,Isao
- Dept. of Metallurgy, Faculty of Engineering, Nagoya University
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- WIGNARAJAH,Sivakurnaran
- Dept. of Metallurgy, Faculty of Engineering, Nagoya University
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- SHINODA,Takeshi
- Dept. of Metallurgy, Faculty of Engineering, Nagoya University
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- YAMADA,Shigeharu
- Dept. of Metallurgy, Faculty of Engineering, Nagoya University:Mitsubishi Heavy Industries
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説明
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.
収録刊行物
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- Transactions of the Japan Welding Society
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Transactions of the Japan Welding Society 14 (1), 34-39, 1983-04-01
Japan Welding Society
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詳細情報 詳細情報について
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- CRID
- 1542261570218324736
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- NII論文ID
- 110003379969
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- NII書誌ID
- AA00867091
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- 本文言語コード
- en
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- データソース種別
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- NDLデジコレ（旧NII-ELS）
- CiNii Articles