我厂采用铁模铸造法生产万吨轮铝青铜艉轴铜套,积累了某些经验。现将其工艺设计介绍如下: 一、线收缩率、工艺 补贴的确定 金属型铸件的线收缩,不仅与合金的线收缩有关,还与铸件结构,铸件在金属型中的收缩受阻的情况,出型温度等有关。ZQAL9—4合金的自由线收缩为2.0％,但实测得铁模铸造的艉轴铜套线收缩径向外径为1.0％, I plant the use of iron casting production of 10,000 tons of aluminum bronze shaft shaft copper sleeve, has accumulated some experience. The process design is introduced as follows: First, the line shrinkage, the process of determining the subsidies Metal casting line contraction, not only with the alloy line contraction, but also with the casting structure, castings in the metal-type contraction blocked the situation out Type temperature and so on. ZQAL9-4 alloy free line contraction of 2.0%, but the measured cast iron shaft shunt shaft shrinkage of the radial diameter of 1.0%