欧洲专利US2013068411本专利涉及一种铸造用Al-Cu合金,该合金具有比Al-Si合金较高的强度,但是铸造流动性较差,而且合金元素的偏析较重和枝晶间的缩松较多。为了减少或避免这种现象的产生,在该合金中加入一些高度分散细小的又硬又脆又不溶的颗粒,充填于枝晶的间隙,这样既不降低合金的韧性,又能改变Al-Cu合金的凝固状态和补缩条件,从而较好地解决了合金的偏析和缩 European patent US2013068411 This patent relates to a casting Al-Cu alloy which has higher strength than Al-Si alloy but inferior casting fluidity, heavy alloying element segregation and more dendrite between dendrites . In order to reduce or avoid the occurrence of this phenomenon, some highly dispersed fine hard, brittle and insoluble particles are added into the alloy and filled in the dendrite gap so as to reduce the toughness of the alloy and to change the Al-Cu The solidification of the alloy and the conditions of feeding, so as to better solve the alloy segregation and shrinkage