铸铁、铸钢、有色等铸件在非装配面、非工作面存在外观缺陷,如缩孔、气孔、砂眼、麻坑等,若就此使用,有碍质量;若将其报废,无疑是极大的浪费。为使该类铸件起死回生,常采用铸件修补技术。对于不同的铸件,可以有不同的修补方法。在不影响铸件强度和使用性能的前提下,首选的方法 Cast iron, cast steel, non-ferrous and other castings in the non-assembly surface, non-working surface appearance defects, such as shrinkage, porosity, trachoma, Ma Hang, etc. If this use, hinder the quality; if scrapped, is undoubtedly great waste. In order to make such castings from the dead, often using casting repair technology. For different castings, there are different ways to repair it. In the premise of not affecting casting strength and performance, the preferred method