Metal treatment – Process of modifying or maintaining internal physical... – Producing or treating layered – bonded – welded – or...
Reexamination Certificate
2005-04-26
2005-04-26
Wyszomierski, George (Department: 1742)
Metal treatment
Process of modifying or maintaining internal physical...
Producing or treating layered, bonded, welded, or...
C148S421000, C228S145000
Reexamination Certificate
active
06884305
ABSTRACT:
The present invention provides a high strength α+β titanium alloy pipe not requiring a large amount of cutting and enabling full use to be made of the features of titanium alloy of light weight and high strength and a method for production of the same. Specifically, a high strength α+β titanium alloy pipe having an outside diameter of at least 150 mm and a wall thickness of at least 6 mm, the α+β titanium alloy pipe characterized by having a welded seam running in the longitudinal direction of pipe at one location and by having a ratio of the minimum wall thickness to the maximum wall thickness of the portions excluding the weld zone of 0.95 to 0.99. Also, a method of production of a high strength α+β titanium alloy pipe comprising cold forming a high strength α+β titanium alloy plate of a wall thickness of at least 6 mm into a tubular shape by the U-O method or press-bending method and welding together the abutted plate edges.
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Fujii Hideki
Murayama Masatoshi
Kenyon & Kenyon
Nippon Steel Corporation
Wyszomierski George
LandOfFree
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