公开(公告)号：EP1516692A4

公开(公告)日：2007-08-29

申请号：EP03761829

申请日：2003-06-27

Applicant: NAT INST FOR MATERIALS SCIENCE

Inventor： KURODA SEIJI ,  FUKUSHIMA T ,  TSUKAMOTO S ,  ARAKANE G

IPC: B23K26/00 ,  B23K26/20 ,  B23K26/14 ,  B23K26/18 ,  B23K26/32 ,  B23K26/42 ,  B23K37/06

CPC classification number: B23K37/06 ,  B23K26/123 ,  B23K26/18 ,  B23K26/60 ,  B23K2201/34 ,  B23K2203/08

Abstract: In a laser welding method, the invasion of atmosphere gas into a molten metal and the occurrence of welding defects are prevented by coating a material having a high affinity for the atmosphere gas on the back surface of a work and therefore it is possible for a large output laser to easily weld a thick plate by employing a simple method.