球墨铸铁件工艺的掌握及其试验工作,是在生产重50—1500公斤的机床零件和锻压机械的情况下进行的。铸型用2-3．5吨的铁水包浇注。在钟罩中处理第一阶段掌握向铁水中加镁是按中央机械制造与工艺科学研究所所推荐的方法用开口的钟罩在小屋中进行的。但在生产中用此法保证稳定地获得球墨铸铁是有着一系列的困难,其主要的如下:首先,加镁处理进行得非常猛烈,以致大量的 The mastery and testing of ductile iron workmanship is carried out with production of machine parts and forging machines weighing 50-1500 kg. Casting with 2-3.5 tons of ladle casting. Handling the first phase in a bell jar Mastering the addition of magnesium to molten iron is carried out in a hut using an open bell jar as recommended by the Central Institute of Machinery and Process Science. But in the production of this method to ensure stable access to ductile iron is a series of difficulties, the main are as follows: First, the magnesium treatment carried out very violently, resulting in a large number of