Title:
STEAM TURBINE MEMBER
Document Type and Number:
WIPO Patent Application WO/2011/111491
Kind Code:
A1
Abstract:
A steam turbine member exerting excellent oxidation resistance is provided at low cost without forming an alloy coating by means of thermal spraying or sintering. Specifically, disclosed is a steam turbine member using, as the base material, a stainless steel, which has Fe as the main component and which contains 8 to 15 weight% of Cr and 0.1 to 1.0 weight% of Mn, wherein the surface of the base material has an oxide film comprising the oxide of the constituent elements of the base material. Preferably, the oxide film has a thickness of 1µm or less. Moreover, the oxide film preferably has a surface roughness (Ra) of 1.6a or less.
Inventors:
HARUYAMA HIROSHI (JP)
ARAI MASAHIKO (JP)
DOI HIROYUKI (JP)
IZUMI TAKESHI (JP)
ARAI MASAHIKO (JP)
DOI HIROYUKI (JP)
IZUMI TAKESHI (JP)
Application Number:
PCT/JP2011/053323
Publication Date:
September 15, 2011
Filing Date:
February 17, 2011
Export Citation:
Assignee:
HITACHI LTD (JP)
HARUYAMA HIROSHI (JP)
ARAI MASAHIKO (JP)
DOI HIROYUKI (JP)
IZUMI TAKESHI (JP)
HARUYAMA HIROSHI (JP)
ARAI MASAHIKO (JP)
DOI HIROYUKI (JP)
IZUMI TAKESHI (JP)
International Classes:
C23C8/14; C22C38/00; C22C38/44; C23C8/18; F01D5/28; F01D25/00; F01D25/24
Domestic Patent References:
| WO2008119638A1 | 2008-10-09 |
Foreign References:
| JP2004018897A | 2004-01-22 | |||
| JP2008223128A | 2008-09-25 | |||
| JP2004183051A | 2004-07-02 | |||
| JP2005248191A | 2005-09-15 | |||
| JP2002309303A | 2002-10-23 | |||
| JP2007507604A | 2007-03-29 |
Other References:
See also references of EP 2546384A4
Attorney, Agent or Firm:
ASAMURA PATENT OFFICE, p. c. (JP)
Patent business corporation Asamura patent firm (JP)
Patent business corporation Asamura patent firm (JP)
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Claims:
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