Method of fabricating a titanium alloy part, a titanium alloy pa

Details Method of fabricating a titanium alloy part, a titanium alloy pa Method of fabricating a titanium alloy part, a titanium alloy pa

1995-01-24

1996-08-13

Kastler, Scott

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148421, C22F 118

Patent

active

055452710

ABSTRACT:
A semi-finished product is taken made of a metastable beta titanium alloy containing oxygen in the range 0.4% to 0.7% by weight, and nitrogen in the range 0.1% to 0.2% by weight (oxygen+nitrogen.ltoreq.0.8%). The product is subjected to solution treatment at a temperature in the range 800.degree. C. to 900.degree. C. It is then cooled very quickly (.gtoreq.200.degree. C. per hour), the part is machined, ageing treatment is applied at a temperature in the range 550.degree. C. to 650.degree. C. for in the range 10 minutes to 2 hours so as to transform half of the beta titanium into alpha prime titanium. The titanium alloy part contains 40% to 60% of beta alloy, the remainder being alpha prime alloy. The part has good mechanical properties, good breaking strength, and a good elastic limit.

REFERENCES:
patent: 5264055 (1993-11-01), Champin et al.
patent: 5358586 (1994-10-01), Schutz et al.

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