我厂较大的铸铁件主要有汽轮机隔板、轴承箱、中汽缸等。铸件容易产生裂纹、气孔、缩孔、夹杂等铸造缺陷。对于一些必须进行焊补的铸件,必须正确选择焊补方法和焊接材料,亦就是说制定正确的焊补工艺,既保证焊补质量又作到经 I plant a larger iron castings mainly turbine partitions, bearing boxes, cylinders and so on. Castings are prone to cracks, porosity, shrinkage, inclusions and other casting defects. For some castings that must be welded, the welding method and the welding material must be correctly selected. That is to say, the correct welding process must be established to ensure the quality of welding and welding