南京航空航天大学学报2025，Vol.57Issue(1)：73-79,7.DOI:10.16356/j.1005-2615.2025.01.007
Sr变质和鼓风冷却对Al-Si-Cu合金的影响
Effect of Sr Modification and Blast Cooling on Al-Si-Cu Alloy
李俭英 1沈以赴 2孙涛2
作者信息
- 1. 南京航空航天大学机电学院,南京 210016||中国航发哈尔滨东安发动机有限公司,哈尔滨 150066
- 2. 南京航空航天大学材料科学与技术学院,南京 211106
- 折叠
摘要
Abstract
In order to meet the development needs of aero-engine with high precision,high strength and light weight,this paper is based on the existing aluminum alloy investment casting technology,to carry out Sr modification treatment and blast cooling process cross-application comparative test in the process of melting and pouring.The microstructure of the samples under different conditions is observed by optical microscope,and the samples under different conditions are tested by tensile machine,so as to study the influence of Sr modification treatment and blast cooling process on the microstructure and properties of the Al-Si-Cu alloy.The results show that when using Al-10Sr intermediate alloy as a grain refiner and blowing cooling in the Al-Si-Cu alloy investment casting process,the most obvious refinement and dulling effects on the α-Al grains and eutectic Si phases in the alloy microstructure occur,and the highest mechanical property indicators are achieved.The average tensile strength,the average yield strength,and the average elongation reach 313 MPa,246 MPa,and 6.9%,respectively.关键词
熔模精密铸造/Al-Si-Cu合金/变质处理/鼓风冷却/抗拉强度Key words
investment casting/Al-Si-Cu alloy/modification treatment/blast cooling/tensile strength分类
金属材料引用本文复制引用
李俭英,沈以赴,孙涛..Sr变质和鼓风冷却对Al-Si-Cu合金的影响[J].南京航空航天大学学报,2025,57(1):73-79,7.
