General Motors Co. believes it is the first automaker to weld steel to aluminum through resistance spot welding, a technique it spent some two years developing and expects will save weight and be less expensive.
The automaker said Wednesday that within a few months it will deploy welded steel to aluminum joinings on a seatback for the Cadillac CT6 luxury vehicle and shortly thereafter on a CT6 hood reinforcement (a steel pedestrian protection reinforcement will be welded to an aluminum hood inner panel).
The CT6 structure includes 11 different materials and uses multiple joining processes. The car is built at GM’s Detroit-Hamtramck Assembly Plant.
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