我厂是生产低压阀门的专业厂家,其中多功能黄铜截止阀为出口产品,销售额达2000万元以上。其阀门主体材质为ZCuZn38Mn2Pb2。由于锰的锌当量较低,它的含锌量较高,容易产生氧化夹渣物,特别易产生二次氧化,且合金的体收缩和线收缩都很大,易产生集中缩孔。因此,在设计浇注系统时很注重它的撇渣能力和补缩能力。一般使合金液经过胃口再流进铸型,同时在热节处设置较大的胃口,目的是充分 Our factory is specialized in the production of low-pressure valve manufacturers, of which multi-purpose brass globe valve for export products, sales of more than 20 million yuan. The valve body material is ZCuZn38Mn2Pb2. Due to the low zinc equivalent of manganese, its high zinc content, prone to oxidation slag, particularly prone to secondary oxidation, and the alloy body shrinkage and linear shrinkage are large, easy to produce concentrated shrinkage. Therefore, when designing the pouring system, it pays attention to its ability of skimming and filling. The general liquid alloy through the appetite and then flow into the mold, while setting a larger appetizer at the hot appetite, the purpose is sufficient