| 摘要 |
PROBLEM TO BE SOLVED: To provide a fusible flux for a submerged-arc welding which does neither cause a shrinkage cavity nor such welding defects as slag engulfment and under-cut etc., and provides an excellent bead shape etc. and welding workability as well as a superb toughness in the welded metal. SOLUTION: The fused flux for the submerged-arc welding contains, for the total weight of the flux, SiO<SB>2</SB>;23-33 mass%, CaO;25-35 mass%, CaF<SB>2</SB>;15-25 mass%, MgO;2-8 mass%, Al<SB>2</SB>O<SB>3</SB>;2-8 mass%, MnO;2-8 mass%, TiO<SB>2</SB>;4-10 mass%, FeO;0.5-4.0 mass% and BaO;≤0.9 mass%. Additionally, it is preferable to contain SrO;0.3-3.0 mass%. COPYRIGHT: (C)2004,JPO
|
