Weldability of Aluminized Sheet Steels for Automobile Application(II) (Effect of Coating Conditions on Laser Weld Quality)

자동차용 알루미늄도금 강판의 용접성(II) (도금조건이 레이저용접 품질에 미치는 영향)

Laser weldability of aluminized steels of 0.8mm thick has been investigated. Test materials were cut from the commercial steels that were produced at the Coating Mill of POCOS. Test coupons for welding were prepared by using a conventional shearing machine and no additional edge treatment was peformed. Nd:YAG laser welding system was mainly applied to make weld specimens. Test results revealed that almost no spattering was observed even though the welding was peformed with no overlap joint clearance. Bead quality of aluminized steel laser weld was smooth and stable. According to x-ray inspection results, it was proved that the laser welds of aluminized steels were metallurgically defect free.