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Title:
HIGH-STRENGTH TITANIUM ALLOY MEMBER AND PROCESS FOR PRODUCTION THEREOF
Document Type and Number:
WIPO Patent Application WO/2012/023620
Kind Code:
A1
Abstract:
Provided is a high-strength titanium alloy material which is highly strengthened in whole by applying nitrogen in a highly versatile α-β-type titanium alloy. Also provided is a process for producing a high-strength titanium alloy member, which comprises: a step of preparing a sintered titanium alloy raw material that serves as a raw material for a sintered product; a nitrogenation step of forming a nitrogen compound layer and/or a nitrogen solid solution layer on the surface layer of the sintered titanium alloy raw material by a nitrogenation treatment to produce a nitrogen-containing sintered titanium alloy raw material; a mixing step of mixing the sintered titanium alloy raw material with the nitrogen-containing sintered titanium alloy raw material to produce a sintered titanium alloy raw material containing a nitrogen-containing titanium alloy; and a sintering step of bonding the raw materials to each other in the sintered titanium alloy raw material containing the nitrogen-containing titanium alloy and dispersing nitrogen contained in the nitrogen compound layer and/or the nitrogen solid solution layer in the nitrogen-containing sintered titanium alloy raw material uniformly in the form of a solid solution in the whole of the inside of the titanium alloy member after sintering.

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Inventors:
ARAOKA YUJI (JP)
SHIRAISHI TOHRU (JP)
ONO YOSHIKI (JP)
Application Number:
PCT/JP2011/068812
Publication Date:
February 23, 2012
Filing Date:
August 15, 2011
Export Citation:
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Assignee:
NHK SPRING CO LTD (JP)
ARAOKA YUJI (JP)
SHIRAISHI TOHRU (JP)
ONO YOSHIKI (JP)
International Classes:
C22C1/04; B22F1/062; B22F1/14; B22F1/145; B22F3/14; B22F3/24; C22C14/00; C22F1/18; C23C8/24; B22F9/04; C22F1/00
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 2607507A4
Attorney, Agent or Firm:
SUENARI, Mikio (JP)
End 成 Mikio (JP)
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Claims:



 
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