Research on Properties of Welded Joint of High Strength Weathering Steels

Mechanical and fatigue properties of the Q450NQR1/BH550NQ- II welded joint are studied. Microstructures of the welded joint are analyzed. The test result shows that mechanical and fatigue properties of the Q450NQR1/BH550NQ- II welded joint can completely meet the requirement for fabricating railway vehicles.