摘要
针对5 mm厚E36高强钢板材,开展了低功率脉冲激光诱导熔化极活性气体保护电弧复合仰焊试验。研究结果表明:相比于熔化极活性气体保护电弧焊,激光诱导熔化极活性气体保护电弧复合焊接接头的焊接热输入可降低29%。复合焊接通过减小焊接熔池尺寸,可有效抑制内凹缺陷的产生,进而增大工艺参数区间。拉伸和弯曲试验表明,无内凹缺陷接头具有良好抗拉强度和弯曲载荷;有内凹缺陷接头抗拉强度与母材相当,但最大弯曲载荷显著降低。
A low-power pulsed laser induced metal active gas(MAG)arc hybrid welding tests in overhead positions were carried out for 5mm thick E36 high strength steel plates.The results show that heat input of laser induced MAG arc hybrid welding is 29%lower than that of single arc welding.By reducing weld pool sizes,hybrid welding may effectively inhibit the formation of concave defects,and then increase the processsing parameter ranges.Tensile tests and bending tests show that the welding joints without internal concave defects have good static tensile strength and bending load.Static tensile strength of the welding joints with internal concave is equivalent to the base metal,but the maximum bending load is significantly reduced.
作者
刘黎明
陈亮
宋刚
LIU Liming;CHEN Liang;SONG Gang(Key Laboratory of Liaoning Advanced Welding and Joining Technology,Dalian University of Technology,Dalian,Liaoning,116024)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2020年第17期2137-2141,共5页
China Mechanical Engineering
基金
国家重点研发计划资助项目(2018YFB1107902/04)。
关键词
脉冲激光焊
电弧焊
高强钢
仰焊
力学性能
impulse laser welding
arc welding
high strength steel
overhead position welding
mechanics property
