| 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 10°C or higher, and, in cases where the temperature of the steel plate is below 10°C, preheating operation is performed such that the temperature of the steel plate is raised to 10°C 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%; and the average Vickers hardness HV at a depth 1 mm below the surface of the weld metal is from 337 to 440. |
