Zero-gap laser welding

Details Zero-gap laser welding Zero-gap laser welding

2004-07-27

2010-10-26

Evans, Geoffrey S (Department: 3742)

Electric heating

Metal heating

By arc

C148S434000, C148S525000

Reexamination Certificate

active

07820939

ABSTRACT:
A method for laser welding a pair of overlapping metal members together and a weld joint produced by the method. At least one of the metal members has a protective metal coating. The method includes applying a thin layer of an alloying agent on at least one of the metal members between the metal members, melting the protective metal coating and the alloying agent to form an alloy that is disposed between the overlapping members with zero gap, welding the overlapping metal members together to form a weld, and controlling the amount of the alloying agent such that the extended solid solubility of the alloying agent in the weld is not exceeded.

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Dsgupta et al., “A Novel method for Lap Welding of Automotive Sheet Steel Using High Power CW CO2 Laser”, Sep. 2005, Proceedings of the 4th international Congress on Laser Advanced Materials Processing, pp. 1-5.
Machine translation of Japan Patent No. 2002-361,461, May 2010.

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