Patent ID: 7875827
Filing Date: 2011-01-25
Classification: B23K

Abstract:
1. A method for laser brazing a first member to a second member using a laser brazing head having first means for providing a first laser beam and second means for providing a second laser beam, the method comprising the steps of: arranging said first member in contact with said second member such that a junction is formed therebetween; providing a filler material in the vicinity of said junction; passing said laser brazing head along said junction such that said first laser beam melts said filler material to at least partially fill said junction to form a brazed joint, and said second laser beam effects a post heat treatment of said brazed joint; allowing the filler material to solidify after being melted by the first laser beam prior to effecting a post heat treatment of the brazed joint by the second laser beam; and wherein the energy per unit area provided by the first laser beam is greater than or equal to at least twice the energy per unit area provided by the second laser beam.