A new technique of crack-free welding of hardenable steels has been developed: The induction supported laser beam welding. It combines a short-time heat treatment generated by inductive heating together with the laser welding process. The superimposed heat treatment cycle hinders the formation of martensite, avoids cold crack formation, toughens the weld seam and allows the welding speed to be increased. After a brief explanation of this novel technique the first industrial application of laser induction welding (LIW) is reported: Laser induction welding of car drive shafts at Ford Axle and Gear Plant Düren, Germany.
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© 1997 Laser Institute of America.
1997
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