有色金属材料与工程2024，Vol.45Issue(3)：84-91,8.DOI:10.13258/j.cnki.nmme.20230212001
电流对铝合金激光填丝焊接接头组织及性能影响研究
Research on the effect of current on microstructure and properties of aluminum alloy laser filled wire welded joint
摘要
Abstract
Laser filled wire welding technology was used to lap weld 3 mm-thick 6061 aluminum alloy,a direct current was added to the welding wire through a wire feeding system,the forming quality of the welded joint after adding the current and its influence mechanism were studied,and the microstructure and mechanical properties of welded joints were analyzed.The results show that an electromagnetic field generates in the molten pool after adding current,and a molten convection forms under the action of Lorentz force,resulting in an electromagnetic stirring.With the increase of the current,the weld surface becomes smooth,and the weld penetration increases.The weld microstructure is refined under the action of electromagnetic stirring,and Mg2Si phase precipitates.After adding current,the stability of the molten pool increases,the composition of the weld microstructure is homogenized,and thus the Vickers hardness values of the weld zone tends to be stable.The tensile strength and plasticity of welded joint increase with the increase of current.When the current is 150 A,the tensile strength of the welded joint is 304.68 MPa,and the elongation is 8.77%.关键词
激光填丝焊/电流/微观组织/力学性能Key words
laser filled wire welded/current/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
刘芳,肖菲,蔡海..电流对铝合金激光填丝焊接接头组织及性能影响研究[J].有色金属材料与工程,2024,45(3):84-91,8.基金项目
国家自然科学基金资助项目(52371070) （52371070）
