BENDING TEST METHOD OF LASER WELDED PORTIONS

摘要

PURPOSE: A bending test method of laser welded portions is provided to more accurately evaluate weldability on the welded portions by performing bending test after mounting a reinforced member on a sample, thereby compensating thickness on the laser welded portions of steel plates having different thicknesses. CONSTITUTION: In a bending test method of laser welded portions of a sample that is obtained by laser welding two metals having different thicknesses, the bending test method of the laser welded portions comprises the processes of adjusting thickness so that the two metals have the same thickness by fixing a reinforced member(20) to the sample(10); bending the welded portions to certain degrees of an angle by applying force onto the sample using a punch(300) after putting a thickness compensated sample(10) on a support(100); and judging weldability of the welded portions after removing the reinforced member(20), wherein the reinforced member is an other sample on which bending test is performed.