Research Progress on Characterization and Regulation of Forming Quality in Laser Joining of Metal and Polymer, and Development Trends of Lightweight Automotive Applications

Metal–polymer hybrid structures have been widely used in research into their lightweight automotive applications, because of excellent comprehensive properties. As an efficient technology for automatic connection dissimilar materials, laser joining has great application potential and development value the field design. However, due to physical chemical differences between metals polymers, formation quality joint is seriously affected by defects, low bonding strength, poor morphology. Meanwhile, it difficult meet demands automobiles considering only strength as target forming quality. Therefore, technological characteristics metal–polymer use applications are analyzed, advantages problems laser-joining discussed, characterization indexes regulation measures summarized. This paper which provides reference guidance reliable forming, intelligent development, polymer–metal structures.