在机床制造业中、铸铁零件的重量约占整机总重的 70—80%。由于铸件生产受多种因素影响,一些局部缺陷难以完全避免。对于这些次品铸件,在不影响机床结构性能的情况下,国内外多采用焊补修复的办法,来使之恢复使用价值。实践证明,这样做具有巨大的经济效果。但是铸铁的可焊性较差 In the machine tool manufacturing industry, the weight of cast iron parts accounts for about 70-80% of the total weight of the machine. Due to a variety of factors affecting the production of castings, some localized defects can not be completely avoided. For these defective castings, without affecting the structural performance of the machine, the domestic and international use of welding repair repair methods to make it to restore value. Practice has proved that doing so has a huge economic effect. However, the weldability of cast iron is poor