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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    Title :

    СПОСОБ СВАРКИ ВНАХЛЕСТ, НАХЛЕСТОЧНОЕ СОЕДИНЕНИЕ, СПОСОБ ИЗГОТОВЛЕНИЯ НАХЛЕСТОЧНОГО СОЕДИНЕНИЯ И ДЕТАЛЬ АВТОМОБИЛЯ


    Publication date :

    2018-03-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Russian


    Classification :

    IPC:    B23K Löten , SOLDERING OR UNSOLDERING / B62D MOTOR VEHICLES , Motorfahrzeuge