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Method of manufacturing a welding method, as well as welded joints of gas shielded arc welding flux cored wire and cryogenic steel
Method of manufacturing a welding method, as well as welded joints of gas shielded arc welding flux cored wire and cryogenic steel
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机译:焊接方法的制造方法以及气体保护电弧焊药芯焊丝与低温钢的焊接接头
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PROBLEM TO BE SOLVED: To provide a flux-cored wire which can provide a weld metal having excellent low-temperature toughness, has a high welding execution efficiency, and enables the omission or simplification of preheating executed for suppressing cold cracks.;SOLUTION: This flux-cored wire contains one or two or more kinds of CaF2, BaF2, SrF2, MgF2, and LiF. When a total amount of their contents is α, the α is 2.0-7.0% by mass% to the total mass of the flux-cored wire and contains one or two or more kinds of Ti oxide, Si oxide, Mg oxide, Al oxide, Zr oxide and Ca oxide. When a total amount of their contents is β, the β is 0.2-0.9% by mass% to the total mass of the flux-cored wire. A ratio of the CaF2 content to the α is 0.90 or more, and a ratio of the α to the β is 3.0 or more and 15.0 or less.;COPYRIGHT: (C)2015,JPO&INPIT
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