Characterizing the Effect of Processing Parameters on Temperature Distribution of 7075 Aluminum Alloy Slurry Prepared by Enthalpy Control Process

Li，Gan; Peng，Jinkang; Dong，Enjie; Chen，Juan; Lu，Hongxing; Zhu，Qiang

10.4028/www.scientific.net/SSP.327.263

2022

1012-0394

1662-9779

SOLID STATE PHENOM

327 SSP

263-271

There is a strong demand for high-strength aluminum alloys such as 7075 aluminum alloy to be applied for rheocasting industry. The overriding challenge for the application of 7075 alloy is that its solid fraction is very sensitive to the variation of temperature in the range of 40% ~ 50% solid fraction, which inevitably narrows down the processing window of slurry preparation for rheocasting process. Therefore, in this work, a novel method to prepare semi-solid slurry of the 7075 alloy, so called Enthalpy Control Process (ECP), has been developed to grapple with this issue. In the method, a medium-frequency electromagnetic field was applied on the outside of slurry preparation crucible to reduce the temperature difference throughout the slurry. The effect of processing parameters, including heating power, heating time, the initial temperature of crucible and melt weight, on the temperature field of the semi-solid slurry was investigated. The results exhibited that although the all processing parameters had a great influence on the average temperature of the slurry, heating time was the main factor affecting the maximum temperature difference of the slurry. The optimum processing parameters during ECP were found to be heating power of 7.5 KW, the initial temperature of crucible of 30 ℃ ~ 200 ℃ and melt weight of 2 kg.

7075 aluminum alloy Enthalpy control process Processing parameters Slurry preparation Temperature difference

第一 ; 通讯

英语

2-s2.0-85127175888

Scopus

Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Li，Gan,Peng，Jinkang,Dong，Enjie,et al. Characterizing the Effect of Processing Parameters on Temperature Distribution of 7075 Aluminum Alloy Slurry Prepared by Enthalpy Control Process[C],2022:263-271.