Study on rheo-diecasting process of 7075R alloys by SA-EMS melt homogenized treatment

4th International Conference on Advances in Solidification Processes

材料科学;物理学

Zhihua, G.^1 ; Jun, X.^1 ; Zhifeng, Z.^1 ; Guojun, L.^1 ; Mengou, T.^1

General Research Institute for Non-Ferrous Metals, Beijing, China^1

关键词: Electromagnetic stirring;    High intensity;    High quality;    High shear rate;    Mechanical performance;    Melt processing;    Rheo-diecasting;    Solidification microstructures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/117/1/012040/pdf
DOI  :  10.1088/1757-899X/117/1/012040

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

An advanced melt processing technology, spiral annular electromagnetic stirring (SA-EMS) based on the annular electromagnetic stirring (A-EMS) process was developed for manufacturing Al-alloy components with high integrity. The SA-EMS process innovatively combines non-contact electromagnetic stirring and a spiral annular chamber with specially designed profiles to in situ make high quality melt slurry, and intensive forced shearing can be achieved under high shear rate and high intensity of turbulence inside the spiral annular chamber. In this paper, the solidification microstructure and hardness of 7075R alloy die-casting connecting rod conditioned by the SA-EMS melt processing technology were investigated. The results indicate that, the SA-EMS melt processing technology exhibited superior grain refinement and remarkable structure homogeneity. In addition, it can evidently enhance the mechanical performance and reduce the crack tendency.