| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a laser welding method for steel plates, by which method high joint strength can be stably achieved in high productivity without causing welding defects. <P>SOLUTION: In the laser welding method for the steel plates, when the steel plates having organic or inorganic antioxidant applied on at least their one side surfaces are lap-joined by laser welding, the ratio of the output (A) of the laser to the welding speed (B) satisfies the following formula (1): 320+178t+4.3C<A/B<3,770-6.4C, wherein A shows the output (W) of the laser, B shows the welding speed (m/min), t shows the thickness (mm) of the steel plates, and C shows the total thickness (μm) of the antioxidant after heat treatment in the joined interfaces of two steel plates to be joined. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
