| 摘要 |
The invention provides a solder for single-surface submerged-arc welding for obtaining right surface welding channel shape and mechanical property. The solder comprises the following components by mass: 6-12% of Si, Si alloy and Si oxide (SiO2 equivalent value), 3-9% of CaO, 15-35% of MgO, 5-23% of TiO2, 2-10% of CaF2, 5-23% of Al2O3, 2-9% of CO2, 0.5-3% of Na2O, 0.1-1% of B2O3, 0.2-1% of Mo, 10-30% of Fe powder, less than 0.9% of Mn, less than 1% of Ti and less than 3% of Al, which satisfy the equations (I)-(III). 0.1<=A<=1.7 (I), when A>=0.7, A>=-0.25*{([Al2O3]+[MgO]+[TiO2])/[T.SiO2]}+2.03 (II), and when A<0.7, A<=0.52*{([Al2O3]+[MgO]+[TiO2])/[T.SiO2]}-2.07 (III). |
