Moderate thick plate is widely used in shipbuilding

steel structure construction

machinery manufacturing

pressure vessel manufacturing

and other engineering fields

and its welding is also one of an important link in industry production. The conventional welding technology of moderate thick plate with unstable quality and low degree of automation is complicated

and the welding efficiency is greatly restricted. Therefore

the development of high-efficiency welding technology for the moderate thick plate can improve the overall production efficiency of the industry

and is of great significance. In this paper

the principle

characteristics and development status of the typical high-efficiency welding methods in the fields of backing welding

filling welding

capping welding and deep penetration welding are summarized

and the existing problems in the engineering application of the high-efficiency welding technology are analyzed

and the development direction of high-efficiency welding technology for the moderate thick plate is pointed out.