Metal fusion bonding – Process – With shaping
Patent
1993-02-24
1994-08-09
Ramsey, Kenneth J.
Metal fusion bonding
Process
With shaping
29458, 228214, B21C 3730
Patent
active
053358414
ABSTRACT:
Disclosed are a welded pipe with an excellent corrosion resistance, having two plate layers on the inner surface thereof, and a method of manufacturing it. The inner surface is coated with the plate layers even on the bead part and other steel foundation-exposed parts. A first plate layer of at least one of Ni, Co and Ni- or Co-base alloys is formed on at least one surface of a steel strip, then a second plate layer made of a metal or alloy having a lower melting point than the metal or alloy of forming the first plate layer is formed over the first plate layer. The thus plated steel strip is formed into a pipe and then heat-treated to give a welded pipe having no exposed steel foundation. The welded pipe has excellent corrosion resistance and workability.
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Ramsey Kenneth J.
Usui Kokusai Sangyo Kaisha Ltd.
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