1.西北工业大学 材料学院，陕西 西安 710072;2.西北工业大学 重庆科创中心，重庆 400000;3.中国航空工业集团公司航空工业第一飞机设计研究院，陕西 西安 710089
1.School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China;2.Chongqing Technology Inno-vation Center, Northwestern Polytechnical University, Chongqing 400000, China;3.AVIC The First Aircraft Institute, Xi 'an 710089, China
Chongqing Technology Innovation and Application Development Project
The mechanical properties of 2219 aluminum alloy can be significantly improved by the solution-aging process. Nevertheless, large residual stress is generated during quenching, exerting negative effects on dimensional stability, fatigue strength, stress corrosion, and other properties. A cold bulging process was introduced between quenching and artificial aging to reduce the quenching residual stress of the 2219 aluminum alloy ring. Firstly, the numerical value and distribution law of the residual stress after quenching and cold bulging of the 2219 aluminum alloy ring were analyzed by finite element method (FEM) simulation. Secondly, the residual stress after quenching, artificial aging and solution-cold bulging-artificial aging of the ring was measured by the drilling method. Additionally, the effect of cold bulging process parameters on residual stress value and uniformity was investigated. Experimental results show that quenching residual stress of 2219 aluminum alloy ring is reduced by up to 85% or more.