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Lap welding method, lap joint, production method of lap joint, and an automobile part
Lap welding method, lap joint, production method of lap joint, and an automobile part
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机译:搭接焊接方法,搭接接头,搭接的制造方法以及汽车零件
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摘要
The present invention has as its object to inhibit fracture due to a HAZ softened part in substantially circular laser lap welding taking the place of resistance spot welding for joining a superposed plurality of steel sheets including a high strength steel sheet.;To solve this problem, the inventors discovered lap welding comprising superposing a plurality of steel sheets and firing a laser to form a substantially circular laser weld (1), which lap welding firing the laser in a straight line through an outer edge of the substantially circular laser weld (1) so as to form a hardened part (8) at the steel sheets and thereby suppressing fracture arising from the HAZ softened part.
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