Copper welding with an infrared(IR)Gaussian laser beam usually shows obvious instability,spatters,and worse surface morphology due to the Gaussian distribution,temperature-dependent IR absorption,and high thermal cond...Copper welding with an infrared(IR)Gaussian laser beam usually shows obvious instability,spatters,and worse surface morphology due to the Gaussian distribution,temperature-dependent IR absorption,and high thermal conductivity in cop-per.In this paper,the IR quasi-continuous-wave Gaussian beam was converted into a vortex ring beam with a phase-plate and then applied to the micro-spot-welding of copper sheets.The welding with the vortex beam demonstrated a significantly improved welding performance,smoother surface morphology,and higher welding stability.Besides,no spatters appeared in the welding process.展开更多
基金This work was supported by the National Natural Science Foundation of China(NSFC)(No.61775153)Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)Major Science and Technology Project of Hubei Province(No.2020AAA003).
文摘Copper welding with an infrared(IR)Gaussian laser beam usually shows obvious instability,spatters,and worse surface morphology due to the Gaussian distribution,temperature-dependent IR absorption,and high thermal conductivity in cop-per.In this paper,the IR quasi-continuous-wave Gaussian beam was converted into a vortex ring beam with a phase-plate and then applied to the micro-spot-welding of copper sheets.The welding with the vortex beam demonstrated a significantly improved welding performance,smoother surface morphology,and higher welding stability.Besides,no spatters appeared in the welding process.
