Production and Properties of Nano-scale Oxide Dispersion Strengthened (ODS) 9Cr Martensitic Steel Claddings
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概要
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The 9Cr-ODS martensitic steel claddings were developed by cold-rolling and subsequent heat-treatment. The standard chemical composition is Fe-0.13C-9Cr-2W-0.2Ti-0.35Y2O3. The substantially elongated grains formed by cold-rolling turned out to be into equi-axied grains by ferrite to austenite phase transformation at the final heat-treatment. The produced claddings have the tempered martensitic structure and excess oxygen of 0.060 mass%. The superior tensile and creep rupture strength were shown in the produced cladding, compared with conventional ferritic (PNC-FMS) and even austenitic (PNC316) claddings at higher temperature and extended time. The strength improvement is attributed to finely distributed nano-scale complex oxide. The coarser ferrite grains produced by slow cooling make further improvement in the tensile and creep rupture strength beyond those of tempered martensite at high temperature and longer testing time. The higher excess oxygen content of 0.137 mass% prevents fine distribution of the oxide particles that lead to inferior high temperature tensile and creep strength.
- 社団法人 日本鉄鋼協会の論文
- 2003-12-15
著者
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FUJIWARA Masayuki
Kobelco, Ltd.
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Kaito T
Japan Atomic Energy Agency
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Kaito Takeji
O-arai Engineering Center Japan Nuclear Cycle Development Institute
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Narita Takeshi
Japan Atomic Energy Agency
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Ukai S
Japan Atomic Energy Agency
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Ukai Shigeharu
O-arai Engineering Center Japan Nuclear Cycle Development Institute
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Kobayashi Tsuguyuki
Japan Atomic Energy Agency
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Kobayashi Tsuguyuki
Komae Laboratory Central Research Institute Of Electric Power Industry
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KOBAYASHI Toshimi
Sumitomo Metal Technology, Inc.
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OHTSUKA Satoshi
Japan Atomic Energy Agency
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OHTSUKA Satoshi
O-arai Engineering Center, Japan Nuclear Cycle Development Institute (JNC)
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NARITA Tsuyoshi
O-arai Engineering Center, Japan Nuclear Cycle Development Institute
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OHTSUKA Satoshi
Advanced Nuclear System Research and Development Directorate, Japan Atomic Energy Agency
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Fujiwara Masayuki
Kobelco Research Institute Inc.
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Fujiwara Masayuki
Oarai Engineering Center Japan Nuclear Cycle Development Institute
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Fujiwara Masayuki
Kobelco Ltd.
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Fujiwara M
Oarai Engineering Center Japan Nuclear Cycle Development Institute
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UKAI Shigeharu
Materials Science and Engineering, Faculty of Engineering, Hokkaido University
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