Investigation of Laser Welding Development and Application on High Standard Stainless Steel Railway Vehicle

In this paper, aiming at high-end stainless steel subway products, a new product of stainless steel rail vehicles manufactured by using thin plate lap laser welding instead of resistance spot welding was first developed in China, which made the stainless steel car body structure more optimized, and the welding quality and manufacturing process of its car body steel structure were significantly improved, and advanced stainless steel vehicles entered the high-end vehicle market. Therefore, this paper develops the laser welding process of stainless steel car body, optimizes the process parameters, defines the weld quality standard and develops the weld quality monitoring device, builds the laser welding manufacturing system, and realizes the batch application of the new laser welding technology in high-end stainless steel rail vehicle products. At present, it has found the world's leading batch production capacity of high-end stainless steel vehicle products and improved the competitiveness of the company at home and abroad.