For example, during the traditional laser cladding process, the laser irradiated the substrate surface and created the molten pool on the surface. High-speed laser cladding illustrated excellent advantages compared with the traditional cladding process ( Zhang et al., 2013 Xiao et al., 2021 Gao et al., 2022). High-speed laser cladding was developed by Fraunhofer Laser Technology Research Institute, and the purpose of this technique was mainly to increase the cladding efficiency ( Cui et al., 2020 Yang et al., 2021 Chen et al., 2022). In order to solve these problems, a new method for steel sheets welding using the high-speed laser cladding technique is proposed in this article. The mechanical properties of the weld head were always decreased owing to those defects ( Xie et al., 2022b Liu et al., 2022 Shin et al., 2022). However, it was very difficult to focus the small laser spot on the narrow gap line between the two sheets during the laser butt welding process, and this always led to incomplete weld penetration and other defects such as gaps and pores ( Ahmad et al., 2020 Chludzinski et al., 2021). It was widely used in a lot of industrial fields such as welding of thin sheets ( Tomashchuk et al., 2017 Gao et al., 2021 Gao et al., 2022). The laser welding technique illustrated obvious advantages compared with traditional welding methods including low heat input, minimal weld distortion, and high-welding speed ( Cheng et al., 2022 Khan et al., 2022 Wang et al., 2022). Welding of lightweight materials is difficult in industrial fields ( Xie et al., 2022a Meng et al., 2021). The results showed that it may be a good choice to use the high-speed laser cladding technique for butt welding of stainless steel sheets. The microstructure was determined using an optical microscope (OM) and scanning electron microscope (SEM). The results also showed that most of the failures did not happen in the welding region, which could be concluded that the strength of joints was higher than that of the substrate. The average tensile strength of the specimens was about 500 MPa, which is almost the same as that of the substrate. The joints were well formed even if the sheets were not spliced together entirely. The results illustrated that good weld joints could be obtained without obvious cracks and pores in most of the specimens. Stainless steel sheets with a thickness of 0.5 mm were welded using the high-speed laser cladding process. In this study, a new method to weld thin steel sheets using a high-speed laser cladding technique is proposed. However, it was very difficult to focus the small laser spot on the narrow gap between the sheets during the laser butt welding process. Laser butt welding of thin steel sheets without filler material was widely used in many industrial fields. 3State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, China.2National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing, China.1School of Mechanical Engineering, Jiangsu University, Zhenjiang, China.Yongjian Li 1* Xiaoting Liu 2 Shixing Yan 2 Peng He 3
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