Metal treatment – Process of modifying or maintaining internal physical... – Producing or treating layered – bonded – welded – or...
Patent
1992-01-28
1993-07-13
Roy, Upendra
Metal treatment
Process of modifying or maintaining internal physical...
Producing or treating layered, bonded, welded, or...
72367, 148670, 148671, C22C 1400
Patent
active
052269817
ABSTRACT:
A method of manufacturing corrosion resistant tubing from seam welded stock of a titanium or titanium alloy metallic material having a hexagonal close-packed crystal structure. The method includes cold pilgering a seam welded tube hollow having a weld area along the seam in a single pass to a final sized tube. The cold pilgering effects a reduction in cross sectional area of the tube hollow of at least 50% and a reduction of wall thickness of at least 50% thereby orienting the crystals in a radial direction. The method also includes annealing the final sized tubing at a temperature and for a time sufficient to effect complete recrystallization and reform grains in the weld area into smaller, homogeneous radially oriented grains. After the recrystallization annealing step, the tubing exhibits enhanced corrosion resistance which is similar to seamless tubing.
REFERENCES:
patent: 3486219 (1969-12-01), Davies et al.
patent: 3969155 (1976-07-01), McKeighen
patent: 4690716 (1987-09-01), Sabol et al.
patent: 4717428 (1988-01-01), Comstock et al.
patent: 4726852 (1988-02-01), Nakanose et al.
patent: 4728491 (1988-03-01), Reschke et al.
patent: 4765174 (1988-08-01), Cook et al.
patent: 4802930 (1989-02-01), Kessler
patent: 4878966 (1989-11-01), Alhertiere et al.
patent: 4990305 (1991-02-01), Foster et al.
patent: 5039356 (1991-08-01), Weiss et al.
Computer Search Rept., US-PTO, Aug. 1992.
Benjamin James F.
Meredith Steven E.
Roy Upendra
Sandvik Special Metals Corp.
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