某铝合金壳体铸件线性缺陷的分析  

Analysis of Linear Defect in Alumimium Alloy Shell Casting

作　　者：于海军[1] 左强[1] 周永江[1] 

机构地区：[1]北京航空材料研究院北京市先进铝合金材料及应用工程技术研究中心,北京100095

出　　处：《铸造技术》2017年第7期1681-1683,共3页Foundry Technology

摘　　要：分析了某航空发动机用铝合金壳体铸件在加工后,荧光检测发现的线性缺陷。结果表明,这种加工后出现的线性缺陷并非裂纹,而是卷入铸件的微小氧化夹杂物受外力作用后在叶片表面的显现。同时,还分析了这种氧化夹杂物的形成原因,并提出了预防措施。The linear defect in an aluminium alloy aero-engine shell casting was analyzied. It is indicated that the linear defect appeared after machining is not crack, it is the appearance of minute-size oxide inclusions involved in casting under the effect of external force. At the same time, the formation reason for oxide inclusion and the precautionary measures were discussed in this paper.

关 键 词：铝合金 壳体铸件 线性缺陷 氧化夹杂物 

分 类 号：V263[航空宇航科学与技术—航空宇航制造工程]