| 摘要 |
PURPOSE:To improve the selective corrosion resistance, toughness and cracking resistance of a welded metal in the circumferential welding of pipes exposed to a corrosive environment incorporating CO2. CONSTITUTION:This method is a gas shielded arc welding method where the chemical composition of a base metal and a welding material (a gas shielded arc welding wire) and the chemical composition range of the welded metal obtained thereby, the difference DELTA (Cu+Ni) and DELTAMo in Cu, Ni and Mo between the welded metal and the base metals, especially and welding conditions are regulated. |
