Abstract: This paper systematically analyzed the influence mechanism of welding parameters of Miebach laser welder on the weld quality of electrical steel (silicon steel). Through the study of key process parameters such as laser power, welding speed, focus position and butt joint process, the influence laws of each parameter on weld formation, penetration depth, microstructure properties and defect generation were revealed. The research found that the matching of laser power and welding speed was the core factor determining weld quality. Precise control of the focus position directly affects the laser energy density distribution, and the zero-gap butt joint process adopted in cold-rolled electrical steel welding can effectively ensure the butt joint accuracy of strip steel and fundamentally reduce weld defects. Furthermore, this paper introduced the application of the quality control and detection system (QCDS) in quality monitoring of electrical steel normalizing and pickling production line, and proposed a multi-objective parameter optimization method based on Taguchi-Grey relational analysis, providing theoretical basis and practical guidance for process adjustment in actual production of electrical steel.

Key words: electrical steel; normalizing and pickling production line; Miebach laser welder; weld quality