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Title:
TITANIUM ALLOY MEMBER AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2012/169304
Kind Code:
A1
Abstract:
Provided is a titanium alloy member having not only high strength and high yield strength in the member surface layer but also high strength and high yield strength internally, in a versatile, inexpensive α-β-type titanium alloy. Also provided is a production method therefor. The production method comprises: a preparation step for a raw material comprising titanium alloy; a nitriding step in which a nitrogen compound layer and/or a nitrogen solid solution layer is formed on the surface of the raw material by nitridation and a nitrogen-containing raw material is produced; a mixing step in which the raw material and the nitrogen-containing raw material are mixed and a nitrogen-containing mixed material is obtained; a sintering step in which nitrogen-containing mixed materials are bonded together, nitrogen in the nitrogen-containing raw material is uniformly scattered in a solid solution state across the entire interior, and a sintered titanium alloy member is obtained; and a hot plastic working step for the sintered titanium alloy member.

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Inventors:
SHIRAISHI TOHRU (JP)
ONO YOSHIKI (JP)
ARAOKA YUJI (JP)
Application Number:
PCT/JP2012/061783
Publication Date:
December 13, 2012
Filing Date:
April 27, 2012
Export Citation:
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Assignee:
NHK SPRING CO LTD (JP)
SHIRAISHI TOHRU (JP)
ONO YOSHIKI (JP)
ARAOKA YUJI (JP)
International Classes:
C22C1/04; A61C8/00; B22F1/145; B22F3/20; B22F3/24; B22F9/04; C22C1/00; C22C14/00; C23C8/24
Domestic Patent References:
WO1996033292A11996-10-24
Foreign References:
JPH08157987A1996-06-18
JP2007113120A2007-05-10
JPH05272526A1993-10-19
JP2000096208A2000-04-04
JP4303821B22009-07-29
Other References:
See also references of EP 2719782A4
Attorney, Agent or Firm:
SUENARI, Mikio (JP)
End 成 Mikio (JP)
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Claims:



 
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