球墨铸铁具有铸造工艺简单、成本低廉等优点,但它又有不易补焊,废品率高的弊病。为提高铸铁产量和质量,降低废品率,二十多年来,我厂开展了球墨铸铁件的补焊工作,取得了一定经验,每年约补焊铸件300吨,使废品率逐年降低到4％以下,为国家节约了大量的资金。气焊气焊补焊球墨铸铁件的工具采用G01-100型割炬,利用机械性能试棒及铸件的出气棒作焊丝,其中稀土残留量应≥0.04％,镁残留量应≥0.04％。焊粉为粉201。 Ductile iron with casting process is simple, low cost, etc., but it has not easy welding, the drawbacks of high ills. In order to improve the output and quality of cast iron and reduce the reject rate, in the past 20 years, our factory has carried out the welding repair work of ductile iron castings and gained some experience. The casting castings are made up to 300 tons every year, so that the rejection rate is reduced to 4% The following, for the country to save a lot of money. Gas welding gas welding nodular cast iron tools using G01-100 type cutting torch, the use of mechanical properties of test bars and castings for the gas sticks, in which the residual amount of rare earth should be ≥ 0.04%, magnesium residue should be ≥ 0.04%. Powder for powder 201.