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焊前,对欲焊的铸铁件和低碳钢件用钢丝刷清理,去掉铁锈,露出金属光泽。将接头开成 X 型坡口,角度为65°,选用 BS—500交流弧焊机,结606焊条,焊条直径3.2毫米,选电流大小为110安;焊条直径4毫米时,选电流大小为180安,焊条在300℃烘干2小时。先在铸铁件上堆焊4～6毫米的过渡层。待过渡层冷却下来(摸上去不烫手)后,进行装配点固焊。对接焊时,使焊件处于自山伸缩状态,每堆焊30～40毫米,停下来用尖头锤敲击焊缝,使焊缝冷却到70～80℃
Before welding, the cast iron parts and low carbon steel parts to be welded are cleaned with a wire brush to remove rust and reveal a metallic luster. The joint opened into the X-groove, the angle of 65 °, the choice of BS-500 AC arc welder, junction 606 electrode, electrode diameter 3.2 mm, the current size of 110 amp; electrode diameter of 4 mm, the current size of 180 Safety, welding rod at 300 ℃ for 2 hours. The first cast iron pieces of surfacing 4 ~ 6 mm transition layer. After the transitional layer cooled down (do not feel hot), the assembly point soldering. Butt welding, the weldment in the mountain telescopic state, each surfacing 30 ~ 40 mm, stop to hit the weld with a pointed hammer, the weld is cooled to 70 ~ 80 ℃