| 摘要 |
PURPOSE:To prevent the occurrence of recracking even for incomplete penetration welding, by subjecting a crack part to the grooving work and repeating a welding pass and transferring the tip of the crack into the weld metal and performing build-up welding. CONSTITUTION:The part of a crack 2 generated in an iron skin 1 is subjected to the grooving work from the surface side of a furnace by arc air gouging. The welding pass is repeated on the bottom face of the groove to provide a space part, where the crack face is extended toward the aperture, in a weld metal 3. After this part 4 to which the tip of the crack is brought, the welding pass is repeated to complete the ordinary build-up welding, thus terminating the remedying welding. Thus, the tip part of the crack, namely, a stress concentrating part remaining inside the remedied part is diffused into the weld metal having a high ductility to lower the crack sensitivity. |
