一、前言 我们机车车辆厂生产的铝合金铸件大多是用于制造各种管道、罩壳。铜合金大多是用于制造各种阀体、轴套,还有一部分是铜铝材质的装饰品铸件。分析铸件报废的原因,主要不是机械性能或几何形状不合格。大部分是因为铸件表面或内部存在氧化夹杂物,造 First, the preface Our locomotive and rolling stock factory production of aluminum alloy castings are mostly used in the manufacture of various pipes, enclosures. Copper alloy is mostly used in the manufacture of a variety of valve body, sleeve, there is a part of copper and aluminum materials, decorative castings. Analysis of cast scrap reasons, mainly not mechanical properties or geometric failure. Mostly because of the existence of the casting surface or internal oxidation inclusions, made