激光技术2025，Vol.49Issue(3)：376-382,7.DOI:10.7510/jgjs.issn.1001-3806.2025.03.009
镁合金调制振荡激光焊接及温度场仿真研究
Study on the modulated oscillation laser welding and temperature field simulation of magnesium alloys
摘要
Abstract
To enhance the thermal efficiency and reduce surface defects in magnesium alloy welding,a power-modulated oscillation laser welding technique was proposed.Butt welding was performed on 5 mm thick AZ31B magnesium alloy,and the surface formation,microstructure,and mechanical properties of the weld were analyzed.Additionally,numerical simulation and simulation analysis of the welding temperature field were conducted.The results indicate that compared to the effects of conventional laser welding,welding defects decrease significantly,weld width increases,and energy coupling efficiency is improved with power-modulated oscillation laser welding.The grains in the center of the weld are refined,and the formation of β-strengthening phases increase,leading to enhanced mechanical properties,with the ultimate tensile strength and elongation reaching 96.1%and 58.7%of the base material,respectively.The temperature at the center of the weld is reduced by approximately 500 K,resulting in a more uniform heat distribution and a decreased temperature gradient in the melt pool.These findings have significant practical implications for improving the performance of magnesium alloy joints,lightweight transportation,and energy conservation and emission reduction.关键词
激光技术/镁合金/激光焊接/显微组织/力学性能/温度场仿真Key words
laser technique/magnesium alloy/laser welding/microstructure/mechanical properties/temperature field simulation分类
矿业与冶金引用本文复制引用
张明军,段维,王锐,王海龙,郭靖,李河清,庞小兵..镁合金调制振荡激光焊接及温度场仿真研究[J].激光技术,2025,49(3):376-382,7.基金项目
国家自然科学基金资助项目(52275311) （52275311）
长沙市自然科学基金资助项目(kq2208226) （kq2208226）
湖南省教育厅科学研究项目(22A0600) （22A0600）
