Bell combined frog repair welding technique

The present invention presents a Bell combined frog repair welding technique, which respectively selects welding rods that are suitable for performing repair welding to austenite and bainite complex phase abrasion resistant steel by modification to Si-Mn-based, Cr-Mo-Ni alloy elements supplemented, supplemented rare earth alloy and V0Ti, to perform cold welding repair welding to center rail of the Bell combined frog, and selects chromium molybdenum vanadium steel surfacing electrode, to performing thermal welding repair welding to wing rail of the Bell combined frog. The method uses a 200Asmall-sized arc-welding power supply to complete the repair welding without any large-scale special welding complete plant. The repair welding process is simpler, because preheating is not needed before welding the center rail of the Bell combined frog, a buffer layer is not needed to weld in repair welding of the center rail and the wing rail, and the post-weld heat treatment is not needed after the welding of the wing rail