简述铸铁焊补是生产中经常遇到的事情。汽车、拖拉机、柴油机、机床,各种机器的铸铁底座及部件在制造和使用中,会产生裂纹、气孔、沙眼等缺陷。铸铁焊补能使废品复活,为国家节约大量财富。由于铸铁本身塑性很差,焊补时容易产生裂纹、白口等,要把工件焊补好,就必须很好的解决这些问题。我国不少工厂在铸铁焊补方面已有许多好经验、好方法。但因铸铁焊补的困难性,现在仍有大量铸铁废件没有得到修复,热焊和半热焊仍然是铸铁焊补 Cast iron welding repair is often encountered in the production of things. Cast iron foundations and parts for automobiles, tractors, diesel engines, machine tools, and various machines, will produce cracks, pores, trachoma and other defects during their manufacture and use. Cast iron welding make waste can be revived, save a lot of wealth for the country. Due to poor plasticity of cast iron itself, cracks and white welds are easily caused when welding is repaired. To weld the workpieces well, these problems must be well solved. Many factories in China have many good experiences in cast iron welding, a good way. However, due to the difficulty of welding cast iron, there are still a large number of cast iron scrap has not been repaired, hot welding and semi-hot welding is still cast iron welding