铸铜件在工程机械结构件中都在关键部位,套类、轴瓦类、缸体等铜件几乎全部是加工面。因此,对铸件的内在质量要求极高。目前铸铜件的炉料来源分两类,一类是新料,即电解铜、纯铝、高锡、纯锌、纯铅、磷铜中间合金等组成,另一类则是浇冒口回炉料及铜屑回炉料。由于铸青铜件产量较大,机加 Casting copper parts in the construction machinery are in the key parts, sets, bearing type, cylinder and other copper parts are almost all the processing side. Therefore, the inherent quality of castings demanding. At present, there are two types of charging sources for castings, one is new material, namely electrolytic copper, pure aluminum, high tin, pure zinc, pure lead and phosphor bronze master alloy. And copper scrap back to the expected. As cast bronze pieces larger, machined