１引言铸铁焊接广泛地应用于铸件缺陷的修补和铸铁部件的修复。由于铸铁在焊接后有硬、脆相形成，属于焊接性较差的材料，容易导致裂纹的产生。因此在焊接时通常采用铸件高温预热；使用镍基、铜基焊条等方法。为获得好的焊接质量，不仅成本很高，而且焊工的劳动条件相当恶劣。 1 Introduction Cast iron welding is widely used to repair casting defects and cast iron parts repair. As the cast iron in the hard after welding, the formation of brittle phase, belong to the poor weldability of materials, easily lead to the generation of cracks. Therefore, the casting is usually used in high temperature preheating; nickel-based, copper-based electrode and other methods. In order to obtain good welding quality, not only the cost is high, but also the working conditions of the welder are rather poor.