The Effect of Solution Time on the Microstructure of A356.2 Aluminum Alloy Provided by Rheocasting and Squeeze Casting

Cheng，Le1; Lu，Hongxing1; Luo，Min1; Li，Xingang1; Zhang，Wanpeng1,2; Zhu，Qiang1

10.4028/www.scientific.net/SSP.327.189

2022

1012-0394

1662-9779

SOLID STATE PHENOM

327 SSP

189-196

The evolution of the microstructure of A356.2 alloys prepared by the rheocasting and squeeze casting during solution heat treatment was investigated. In contrast with the conventional solution heat treatment process (3 hours at 540 ºC), a short time solution treatment process (less than 1 hour at 540 ºC) is applied in this paper. The results show that the rheocastings require a shorter solution time than the squeeze-castings to obtain spheroidized Si particles. After solution for 10 min, the X-ray diffraction inspection results show that the Mg2Si phase is completely dissolved in both rheocastings and squeeze-castings. However, a small amount of Mg2Si is found at the edge of the Si particle by scanning electron microscope observation. After solution for more than 20 min, the Mg2Si phase is completely dissolved. Fe-rich phases, including AlSiFeMg and AlFeSi, exist throughout the solution process. The developed T6 heat treatment with a short solution time can effectively improve production efficiency and decrease process cost for the rheocasting process.

A356.2 alloy Microstructure Rheocasting Short solution time Squeeze casting

第一 ; 通讯

英语

2-s2.0-85127197626

Scopus

1.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Beihang University,School of Mechanical Engineering and Automation,Beijing,100191,China

Cheng，Le,Lu，Hongxing,Luo，Min,et al. The Effect of Solution Time on the Microstructure of A356.2 Aluminum Alloy Provided by Rheocasting and Squeeze Casting[C],2022:189-196.