中国激光, 2019, 46 (2): 0202003, 网络出版: 2019-05-09   

焊前激光预处理的铝合金表面氧含量的分布及影响 下载: 1116次

Distribution and Influence of Oxygen Content of Laser Pretreated Aluminum Alloy Surface Before Welding
作者单位
1 江苏大学机械工程学院, 江苏 镇江 212013
2 江苏科技大学材料科学与工程学院, 江苏 镇江 212013
3 浙江省水利水电装备表面工程技术研究重点实验室, 浙江 杭州 310012
摘要
为提高6061铝合金的焊缝质量,采用纳秒脉冲激光预处理6061铝合金表面,利用扫描电子显微镜观察其表面形貌,研究了不同激光参数下氧元素的线、面含量及分布;为了验证清洗效果,进行了焊接实验。结果表明:最优的激光预处理参数为:激光功率15 W,清洗5次。在最优的加工参数下,表面氧元素的质量分数为3.23%,氧主要分布在光斑搭接处,铝合金焊缝平滑均匀,无明显的缺陷存在;激光预处理后,铝合金表面的氧元素含量越低,焊缝质量越高;分布于光斑周围的少量氧元素不影响焊接效果。
Abstract
In order to improve the welding quality of 6061 aluminum alloy, we utilize the nanosecond pulse laser to pretreat 6061 aluminum alloy, and then observe its surface morphology with scanning electron microscope. The contents and distribution of oxygen at different laser parameters are studied by line analysis and surface analysis. In order to verify the laser cleaning effect, we carry out the welding experiments. The research results show that the optimal laser pretreatment parameters is cleaning the aluminum alloy surface 5 times with 15 W pulse laser power, which makes the mass fraction of oxygen is 3.23%, and oxygen is mainly distributed in the overlapping place of the spot. The weld is smooth and uniform,and without any obvious defects after pretreatment with laser optimum process parameters. The lower surface oxygen content, the higher weld quality. The small amount of oxygen distributed around the spot does not affect the welding quality.

佟艳群, 张昂, 黄建宇, 李瑞峰, 周建忠, 陈小明, 任旭东. 焊前激光预处理的铝合金表面氧含量的分布及影响[J]. 中国激光, 2019, 46(2): 0202003. Yanqun Tong, Ang Zhang, Jianyu Huang, Ruifeng Li, Jianzhong Zhou, Xiaoming Chen, Xudong Ren. Distribution and Influence of Oxygen Content of Laser Pretreated Aluminum Alloy Surface Before Welding[J]. Chinese Journal of Lasers, 2019, 46(2): 0202003.

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