| 摘要 |
This weld joint production method is a method for producing a weld joint by subjecting a steel plate having a predetermined Vickers hardness HV, plate thickness, C content, and CEN to gas-shielded arc welding by using a flux-cored wire in which a steel-made outer sheath is filled with a flux, wherein: at the time of said gas-shielded arc welding, no preheating operation is performed in cases where the temperature of the steel plate is 10oC or higher, and, in cases where the temperature of the steel plate is below 10oC, preheating operation is performed such that the temperature of the steel plate is raised to 10oC or higher; the weld metal of the weld joint has a predetermined chemical composition; the weld metal has a CEN of from 0.20 to 0.58 mass pcnt ; and the average Vickers hardness HV at a depth 1 mm below the surface of the weld metal is from 337 to 440. |
