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Title:
燃料電池用転動部材、燃料電池用転がり軸受およびその製造方法
Document Type and Number:
Japanese Patent JP4699906
Kind Code:
B2
Abstract:

To provide a rolling member for a fuel cell having high corrosion resistance and hydrogen resistance fatigue strength; to provide a rolling bearing for a fuel cell having high hydrogen resistance fatigue strength; and to provide a method for producing the same.

An outer ring 11, an inner ring 12 and a ball 13 as rolling members for a fuel cell are each composed of a steel having a composition comprising, by mass, 0.2 to 1.2% carbon, 0.15 to 1.0% silicon, 0.3 to 1.5% manganese, 6.0 to 12.0% chromium and at least either vanadium or molybdenum of 1.0 to 6.0% in total, and the balance iron with inevitable impurities, and in which the ratio of the content of carbon to the total content of vanadium and molybdenum is 0.16 to 0.24. Also, at least either vanadium carbide or molybdenum carbide with a diameter of ≤10 nm is precipitated in the steel.

COPYRIGHT: (C)2007,JPO&INPIT


Inventors:
Hiroshi Hamada
Application Number:
JP2006009741A
Publication Date:
June 15, 2011
Filing Date:
January 18, 2006
Export Citation:
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Assignee:
ntn corporation
International Classes:
C22C38/00; C21D9/40; C22C38/24; F16C33/32; F16C33/34; F16C33/62; F16C33/64; F16C43/04; H01M8/04
Domestic Patent References:
JP2000282178A
JP2000328203A
JP2004225743A
JP2005069273A
Attorney, Agent or Firm:
Kuro Fukami
Toshio Morita
Yoshihei Nakamura
Yutaka Horii
Hisato Noda
Masayuki Sakai