镀锌钢因其良好的抗腐蚀性能而广泛应用于各个领域,而镀锌层的存在使得镀锌钢的焊接过程和焊接质量受到不利影响。激光焊接是实现镀锌钢焊接的一种新方法。激光深熔焊接镀锌钢的过程中存在着锌蒸气和锌等离子体两种特有焊接特征。镀锌钢激光焊接的根本问题是锌蒸气对焊接过程的影响,减少镀层锌的蒸发和顺利排出锌蒸气是降低锌蒸气影响的根本途径。围绕镀锌钢激光焊接的关键技术,讨论了提高激光焊接镀锌钢焊接质量的多种工艺和方法,包括寻求特定的工艺措施、工艺参数优化和焊接过程的仿真优化以及在线检测控制。

Galvanized steel is widely used in industry due to its excellent corrosion resistance. However,the zinc coating greatly reduces the welding process property of galvanized steel. As a new technique,laser welding is implemented to realize the joint of galvanized steel. There are two unique characteristics,zinc vaporization and zinc plasma,existing in deep penetration laser welding of galvanized steel. The key issue of laser welding of galvanized steel is the influence of the zinc vapor during the welding process. The reduction and elimination of the zinc coating evaporation are the fundamental methods to avoid the influence of the zinc vapor. Based on the key technology of laser welding of galvanized steel,varied welding processes and solutions are discussed to improve the quality of the laser welding,including specific processes,process parameters and simulation optimization,as well as the online monitoring and controlling during the welding process.