A Study on the Weldability of Magnesium Alloy by Laser Heat Source (Ⅲ)
- Butt Weldability of Sand Casting Magnesium Alloy using Pulsed Nd:YAG Laser -

Kim, Jong-Do; Lee, Jung-Han; Lee, Mun-Yong

doi:2013.31.2.57

J Weld Join > Volume 31(2); 2013 > Article

Research Paper

Journal of KWJS 2013;31(2):57-62.
DOI: https://doi.org/10.5781/KWJS.2013.31.2.57 Published online June 5, 2013.

A Study on the Weldability of Magnesium Alloy by Laser Heat Source (Ⅲ) - Butt Weldability of Sand Casting Magnesium Alloy using Pulsed Nd:YAG Laser -

Jong-Do Kim, Jung-Han Lee, Mun-Yong Lee

Correspondence: Jong-Do Kim,
Email: jdkim@hhu.ac.kr

Abstract

Magnesium has good castability and limited workability, so its products have been manufactured by almost casting processes. In this study, a pulsed Nd:YAG laser was used to butt-weld the sand casting magnesium alloys. And the effect of welding conditions such as peak power, pulse width, welding speed was evaluated in detail. As a result of this study, large underfill and plenty of spatter taken place under the conditions with high peak power. Thus, it is recommended to use low peak power and long pulse width to obtain good welds with deep penetration. It is also confirmed that the welding speed and pps(pulse per second) are directly connected at weld defects such as underfill, porosity.

Key Words: Sand casting magnesium alloy, Pulsed Nd:YAG laser, Butt welding, Welding parameters, Underfill