铸造锌铝系合金底缩现象探讨  

Discussion on Bottom-Shrinkage in Cast Zn-Al Alloy

作　　者：端木光明[1] 

机构地区：[1]四川农业大学

出　　处：《特种铸造及有色合金》1999年第6期40-42,共3页Special Casting & Nonferrous Alloys

摘　　要：锌铝系合金铸造时出现反常的底部缩孔,而用一般上置式冒口对此类缩孔的补缩效果甚微。由于重力偏析造成的异常成分过冷导致底缩现象,因此针对成因提出消除或减轻底缩的途径。There is abnormal bottom shrinkage in Zn Al alloy castings and top riser has little effect on them. The reason causing bottom shrinkage is that gravitational segregation results in unusual composition undercooling, the method to eliminate or ease bottom shrinkage is given.

关 键 词：锌铝系合金 底缩 成分过冷 重力偏析 铸造 

分 类 号：TG291[金属学及工艺—铸造]