Nd:YAG 펄스 레이저를 이용한 AZ31B 마그네슘 합금의 겹치기 용접에서 발생하는 용접결함과 그 대책에 대한 연구

저자

김*식

게재저널

Journal of KWJS(대한용접접합학회지) (http://www.kws.or.kr/)

키워드

AZ31B magnesium alloy, Pulsed Nd:YAG laser, Lap welding, Weld defects, Pulse control

개요

With a tendency for the application of thin magnesium alloy plates in portable electronic equipment such
as cell phone and notebook PC, there is a requirement to develop a welding technology for the lap
welding of these thin magnesium alloy. This paper presents the single pulsed laser welding of AZ31B
magnesium alloy. The effects of fiber types and parameters such as peak power and pulse width on laser
weldability were investigated. The results show that weld defects, especially solidification crack, were
always generated in the weld. These defects couldn't be controlled by the simple square pulse, but could
be improved through the application of variable pulse. It is because that variable pulse has effect of
solidification delay by dropping peak power gradually.

첨부파일

• 20. 김영식_대한용접접합학회지.pdf [1,858,865 byte]

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