C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
C21D 8/10 (2006.01) B21C 29/00 (2006.01) B21C 37/06 (2006.01) B21C 37/08 (2006.01) B21C 37/30 (2006.01) F16L 9/02 (2006.01)
Patent
CA 2253323
A process for forming a cylindrical pipe from a welded metal pipe stock by roll extruding and annealing whereby the weldment microstructure forming the seam is essentially reformed to provide a recrystallized grain structure which is substantially homogeneous with the parent material of the pipe stock.
Dosdourian Michael J.
Glasier Louis F. Jr.
Kaiser Aerospace & Electronics Corp.
Macrae & Co.
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