发明名称 |
AUSTENITIC STAINLESS STEEL PIPE EXCELLENT IN STEAM OXIDATION RESISTANCE AND MANUFACTURING METHOD THEREFOR |
摘要 |
There is provided an austenitic stainless steel pipe excellent in steam oxidation resistance. The austenitic stainless steel pipe excellent in steam oxidation resistance contains, by mass percent, 14 to 28% of Cr and 6 to 30% of Ni, and is configured so that a region satisfying the following Formula exists in a metal structure at a depth of 5 to 20μm from the inner surface of the steel pipe: (α/β)×δ/ε×100≧0.3 where the meanings of symbols in the above Formula are as follows:α: sum total of the number of pixels of digital image in region in which orientation difference of adjacent crystals detected by electron backscattering pattern is 5 to 50 degreesβ: the number of total pixels of digital image in region of measurement using electron backscattering patternε: analysis pitch width of electron backscattering pattern (μm)δ: grain boundary width (μm).
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申请公布号 |
US2012279607(A1) |
申请公布日期 |
2012.11.08 |
申请号 |
US201213486503 |
申请日期 |
2012.06.01 |
申请人 |
NISHIYAMA YOSHITAKA;YOSHIZAWA MITSURU;SETO MASAHIRO;TANAKA KATSUKI;SUMITOMO METAL INDUSTRIES, LTD. |
发明人 |
NISHIYAMA YOSHITAKA;YOSHIZAWA MITSURU;SETO MASAHIRO;TANAKA KATSUKI |
分类号 |
F16L9/00;C21D7/06 |
主分类号 |
F16L9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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