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Production and Properties of Nano-scale Oxide Dispersion Strengthened (ODS) 9Cr Martensitic Steel Claddings
Title: | Production and Properties of Nano-scale Oxide Dispersion Strengthened (ODS) 9Cr Martensitic Steel Claddings |
Authors: | Ukai, Shigeharu Browse this author →KAKEN DB | Kaito, Takeji Browse this author | Ohtsuka, Satoshi Browse this author | Narita, Tsuyoshi Browse this author | Fujiwara, Masayuki Browse this author | Kobayashi, Toshimi Browse this author |
Keywords: | ODS | yttria | phase transformation | martensite | ferrite | excess oxygen | cladding | tensile strength | creep rupter strength | cold rolling | grain size |
Issue Date: | 15-Dec-2003 |
Publisher: | Iron and Steel Institute of Japan |
Journal Title: | ISIJ International |
Volume: | 43 |
Issue: | 12 |
Start Page: | 2038 |
End Page: | 2045 |
Publisher DOI: | 10.2355/isijinternational.43.2038 |
Abstract: | 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. |
Rights: | 著作権は日本鉄鋼協会にある |
Type: | article |
URI: | http://hdl.handle.net/2115/76318 |
Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 鵜飼 重治
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