摘要
对用于生产航空材料受力厚板的7050合金扁锭的铸造工艺进行研究。由于7050合金的化学成分复杂,Cu、Zn元素含量高,Fe、Si杂质元素含量控制较低,同时扁锭的规格较大,宽厚比也较大,在铸造时具有极大的裂纹倾向,铸造成型性极差。通过对7050合金化学成分的优化,在生产允许条件下将Fe/Si比、Zn/Mg比提高到上限,Cu含量降低到下限,并且用块状Al-5Ti-1B和丝状Al 5Ti 1B进行联合晶粒细化,提高了合金的成型性,并铸造出成型的铸锭。
The casting technology of 7050 alloy bilits is researched. that are used to produce slabs for air materials.Because the composition of 7050 alloy is very complex,the Cu and Zn elements contents are higher and Fe and Si impurity elements contents are controlled lower, at the same time ,the specification and the width-thickness ratio are large ,all of above result the tremendous crack trend when casting and bad casting formation performance . The formation performance of 7050 alloy has been improved and qualified billits are obtained by optimizing the composition of 7050 alloy, including raising Fe/Si ratio and Zn/Mg ratio ,reducing Cu content and adopting the joint refinement with block and silk shaped Al-5Ti-1B.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2004年第4期100-102,117,共4页
Journal of Chongqing University
关键词
7050合金
扁锭
化学成分
成型性能
7050 alloy
billits
chemical compoition
formation performance
