采用专用焊丝H03MnNi3MoTiB和自行研制的氟碱型烧结焊剂, 在不同的焊接线能量下对X100管线钢进行双丝双面埋弧焊接, 对焊剂的脱渣性及焊后熔渣的物相进行了分析。结果表明: 当焊接材料及焊接方法一定时, 在22.47 kJ·cm-1的焊接线能量下, 脱渣性良好; 在不同焊接线能量下焊接后, 熔渣中除了存在焊剂的主要组分CaF2、MgO、Al2O3、MnO、SiO2外, 还生成了新物相MgAl2O4和Mg2SiO4, 虽然熔渣中有尖晶石型化合物生成, 但在合适的线能量(22.47 kJ·cm-1)下, 脱渣性仍相当优异。

Using manufactured fluorine alkali type sintered flux and the dedicated wire H03MnNi3MoTiB to weld X100 pipeline steels by double-wire automatic two-sided submerged-arc welding at different heat inputs, and then the detachability of the flux and the phases of slags after welding were analysed. The results show that when welding materials and welding methods were constant, the slag detachability was good at the weld heat input of 22.47 kJ·cm-1. After welding at different weld heat inputs, the main components of the slags consisted of CaF2, MgO, Al2O3, MnO and SiO2, in addition, the new phases MgAl2O4 and Mg2SiO4 were obtained. Although there were spinel-type compounds in the slag, its slag detachability was still excellent in the appropriate weld heat input of 22.47 kJ·cm-1.