Application and development trend of new welding technologies in railway vehicles manufacturing industry

This paper introduces the application of new automatic welding technologies in railway vehicles manufacturing industry,and presents the state of art of advanced friction stir welding technology,semi-penetration laser welding technology and laser-arc hybrid welding technology in manufacturing aluminum alloy body shell,stainless steel body shell and bogie.This paper also analyzes the application and development trend of three welding technologies in the future.