汽车工程 ›› 2022, Vol. 44 ›› Issue (11): 1786-1796.doi: 10.19562/j.chinasae.qcgc.2022.11.017
所属专题: 车身设计&轻量化&安全专题2022年
• • 上一篇
张明军,李雄,李河清,李晨希,张健,程波,王开明,毛聪,胡永乐()
收稿日期:
2022-05-18
修回日期:
2022-06-30
出版日期:
2022-11-25
发布日期:
2022-11-19
通讯作者:
胡永乐
E-mail:yonglehu@csust.edu.cn
基金资助:
Mingjun Zhang,Xiong Li,Heqing Li,Chenxi Li,Jian Zhang,Bo Cheng,Kaiming Wang,Cong Mao,Yongle Hu()
Received:
2022-05-18
Revised:
2022-06-30
Online:
2022-11-25
Published:
2022-11-19
Contact:
Yongle Hu
E-mail:yonglehu@csust.edu.cn
摘要:
为提高AZ31B镁合金激光焊接质量,采用纳秒脉冲激光清洗对试件表面进行焊前清洗。采用扫描电镜和能谱仪分析了不同清洗方式下的表面形貌和化学成分,通过高速摄影直接观测了激光焊接动态过程,研究了不同清洗方式和参数对表面清洗效果和焊接质量的影响。结果表明,纳秒脉冲激光清洗可有效去除镁合金表面的氧化膜,且试件表面呈现细密的微结构特征。与未处理和钢刷打磨处理相比,焊前激光清洗对镁合金激光焊接小孔和熔池的稳定具有积极作用;焊缝表面鱼鳞纹均匀细小,接头显微组织沿板厚方向分布均匀,气孔和裂纹等缺陷少。焊前激光清洗可显著提升镁合金激光焊接接头伸长率。与未处理和钢刷打磨处理相比,接头伸长率分别提高50.3%和16.4%。合适的激光清洗可有效清除镁合金表面氧化膜,改善表面微结构,得到较高的接头抗拉强度和伸长率。
张明军,李雄,李河清,李晨希,张健,程波,王开明,毛聪,胡永乐. 纳秒脉冲激光清洗对AZ31B镁合金激光焊接质量的影响[J]. 汽车工程, 2022, 44(11): 1786-1796.
Mingjun Zhang,Xiong Li,Heqing Li,Chenxi Li,Jian Zhang,Bo Cheng,Kaiming Wang,Cong Mao,Yongle Hu. Influence of Nanosecond Pulsed Laser Cleaning on Laser Welding Quality of AZ31B Magnesium Alloy[J]. Automotive Engineering, 2022, 44(11): 1786-1796.
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