Microstructure and Mechanical Properties of Welded Joints of Low Carbon Steels Welded by Laser Beam Oscillating Welding

Jingyu, 陈靖雨 Chen; Xiaonan, 王晓南 Wang; Fan, 吕凡 Lü; Zhixin, 夏志新 Xia; Xiaming, 陈夏明 Chen; Zhenguang, 刘珍光 Liu; Min, 张敏 Zhang; Changjun, 陈长军 Chen

doi:10.3788/cjl202047.0302006

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“…Laser welding [3,4] is generally considered to be superior to conventional welding methods for joining dissimi-lar metals [5] . The heat source of laser welding is the laser beam with high energy density.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Laser Welded Joint of Copper and Steel Dissimilar Metals

REN

Tao

et al. 2023

Wuhan Univ. J. Nat. Sci.

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In this research project, copper and stainless steel were connected by two laser welding methods: straight seam welding and swing welding. Then, electronic tensile test machine, X-ray diffractometer, scanning electron microscope and metallographic microscope were used to analyze the tensile properties, macroscopic and microscopic structure morphology and phase of the welded joint. Based on the experimental results, we determined that the strength of the straight seam welded joint was higher. Because of the intermetallic compound near the weld in the swing welding process, it leads to stress concentration, crack cracking and strength reduction. In addition, the oscillating laser beam also leads to the disorderly direction of columnar crystal and coarse structure, which makes the joint strength decrease.

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Section: Introductionmentioning

confidence: 99%