Studies on welding of steel-aluminum dissimilar metal based on the ship

Based on the properties of the steel-aluminum transition joints and current status of dissimilar materials welding between steel and aluminum , the structural characteristic，connection form among the joint and the connection between the steel hull and the aluminum alloy superstructure were introduced. According to the shipbuilding inspections for many steel-aluminum ships, the transition joint structure, the selection for structure size, welding parameters optimization, the actual welding requirements and so on were analyzed. And no delamination defects in steel-aluminum transition joint were found during the ship operation, the design and welding process would be of certain significance for other ships.