Effect of primary ?-al morphology in slurry on segregation during 357 semi-solid die casting

Zhang, Hong1; Li, Daquan1; Qu, Wenying1; Zhang, Fan1; Luo, Min1; Midson, Stephen2; Zhu, Qiang3

10.4028/www.scientific.net/SSP.285.398

2019

16629779

15th International conference on Semi-Solid Processing of Alloys and Composites, S2P 2018

285 SSP

398-402

Shenzhen, China

Trans Tech Publications Ltd

Controlling the morphology of the microstructure of the slurry is important during semi-solid die casting. For this project, semi-solid slugs were produced using the SEED (Swirled Enthalpy Equilibrium Device) process, where a fully liquid metal is poured into a steel crucible and cooled into the semi-solid temperature range, and the crucible and slurry are then swirled and cooled to the appropriate temperature (and solid fraction) for semi-solid casting. The pouring temperature of the melt into the crucible during SEED processing has been shown to influence the morphology and size of the aluminum solid particles within the slurry, which can influence the distribution and segregation of the solid particles during die casting. In this study, a specially-designed die with a serpentine-shaped flow channel has been used to study the distribution of the solid particles during semi-solid die casting. The experimental results show that a dendritic structure is formed when the liquid is poured from a high temperature, while a globular semi-solid morphology is more easily formed when poured from a low superheat. The current results also show that a dendritic structure leads to severe segregation during die casting.
© 2019 Trans Tech Publications, Switzerland.

其他

EI

National Basic Research Program of China (973 Program)[2016YFB0301001] ; Shenzhen Science and Technology Innovation Commission[]

20190306384077

Aluminum alloys ; Channel flow ; Crucibles ; Die casting ; Die castings ; Dies ; Morphology ; Serpentine ; Silicate minerals

Minerals:482.2 ; Metallography:531.2 ; Metallurgical Furnaces:532 ; Foundries:534.1 ; Foundry Practice:534.2 ; Aluminum Alloys:541.2 ; Fluid Flow, General:631.1 ; Materials Science:951

EV Compendex

1.General Research Institute for Nonferrous Metals, Beijing; 100088, China
2.Colorado School of Mines, Golden; CO; 80401, United States
3.Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen; 518055, China

Zhang, Hong,Li, Daquan,Qu, Wenying,et al. Effect of primary ?-al morphology in slurry on segregation during 357 semi-solid die casting[C]:Trans Tech Publications Ltd,2019:398-402.