β-TYPE TITANIUM ALLOY AND PROCESS FOR PRODUCING THE SAME

Title:

β-TYPE TITANIUM ALLOY AND PROCESS FOR PRODUCING THE SAME

Document Type and Number:

WIPO Patent Application WO/2003/104506

Kind Code:

A1

Abstract:

A β-type titanium alloy that is excellent in cold workability, exhibits high strength after aging and is excellent in stability of properties. This alloy comprises, in terms of mass percentage, 15 to 25% of V, 2.5 to 5% of Al, 0.5 to 4% of Sn, 0.20% or less of O (oxygen), 0.03% or less of impurity H, 0.40% or less of Fe, 0.05% or less of C and 0.02% or less of N. The process for producing the alloy is characterized in that pickling with an aqueous solution containing 3 to 40 mass% of HF as a main component and pickling with an aqueous solution containing 3 to 6 mass% of HF and 5 to 20 mass% of HNO₃ are performed in sequence.

Inventors:

TAKAHASHI WATARU (JP)

Application Number:

PCT/JP2003/007297

Publication Date:

December 18, 2003

Filing Date:

June 09, 2003

Export Citation:

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Assignee:

SUMITOMO METAL IND (JP)
TAKAHASHI WATARU (JP)

International Classes:

C22C14/00; C22F1/18; C23G1/10; C23G1/12; (IPC1-7): C22C14/00; C23G1/12

Foreign References:

JPH02129331A	1990-05-17
JPH09324217A	1997-12-16
JPH06264204A	1994-09-20
US6267831B1	2001-07-31
JPS62180091A	1987-08-07

Other References: