METHOD FOR PRODUCING A WELDED CONNECTION AND METHOD FOR REPAIRING A WELDED CONNECTION

Producing a welded joint between a first part (1) made of ferritic material that has plating (14) on the inside and a nickel alloy buffer layer (16) one the end and a second part (2) made of austenitic material comprises placing the ends of the parts together, welding a root (25) of austenitic material between the plating and the end of the second part, welding an intermediate layer of nickel alloy (at least 90% nickel) between the plating and the end of the second part above the root, and forming a weld seam (19) of nickel-based material in the rest of the gap between the two ends. An independent claim is also included for repairing a welded joint comprising a weld seam of nickel-based material between two parts as above by cutting a recess in the weld seam on the plating side, introducing an intermediate layer as above, welding a capping layer of austenitic material onto the intermediate layer, and machining the capping layer smooth.