精铸件经过酸洗、磷化等工序后,常常发生“吐锈”现象,严重地影响产品质量,成为生产上的老大难问题。为此,陵川机械厂成立了防锈攻关小组,经过两年试验,采用“真空防锈”工艺,初步解决了这一难题。所谓真空防锈就是将零件放入真空罐中,进行真空处理,使精铸另件各流松孔内的酸剂、杂质、空气等抽干净,之后注入 Casting after pickling, phosphating and other processes, often “spit rust” phenomenon, a serious impact on product quality, production has become a chronic problem. To this end, Lingchuan Machinery Factory set up a rust-proof research team, after two years of testing, the use of “vacuum rust” process, the initial solution to this problem. The so-called vacuum rust is to put the parts into the vacuum tank, vacuum processing, so that pieces of casting parts of each flow loose acid, impurities, such as air pumping, and then injected