Caterpillar Inc.
METHOD AND SYSTEM FOR WELDING INCONEL TO STAINLESS STEEL

Abstract:

A method of gas metal arc welding, (GMAW) an Inconel part to a stainless steel part, including forming a weldable joint between a first surface of the Inconel part having a first thickness and a second surface of a stainless steel part having a second thickness at the weldable joint that is greater than the first thickness, welding the Inconel part to the stainless steel part along the weldable joint with the welding torch, delivering an output from the welding power source to the welding torch during welding, wherein the output of the welding power source is in the range of 100 amps to 400 amps and in the range of 14 volts to 30 volts, and delivering a continuous weld wire to a distal tip of the welding torch during welding, wherein a feed rate of the weld wire is in the range of 3 m/min. to 9 m/min.