| 摘要 |
PURPOSE:To obtain an excellent fused flux for submerged arc welding by constituting the flux of a specific amt. of SiO2, CaO, F, Al2O3, TiO2 and one or >=2 kinds of MgO and BaO, one or >=2 kinds among K2O, Na2O, Li2O and MnO. CONSTITUTION:A fused flux for submerged arc welding is made of the compsn. contg., by weight %, of >35 SiO2, <10 CaO, 1.5-6 F, <15 Al2O3, 1-8 TiO2 and 10-25 total of MgO and BaO. A (one and >=2 kinds among K2O, Na2O and Li2O)/F ratio is made 0.1-0.4, SiO2+Mn is made 55-70 and an SiO2/MnO ratio is made 1.4-1.9. |
