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Characterization of solidification time and shrinkage porosity of a semi-solid metal Slurry in gravity die casting

S.Thanabumrungkul1, W.Joompol2, N.Meemongkol3and J.Wannasin4

1Department of Mining and Materials Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
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2GISSCO Company Limited,170/4 Moo 3 Phawong, Muang Songkhla,
Songkhla 90110, Thailand
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3Department of Industrial Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
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3The Southern Thailand Science Park/ Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
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Abstract

Current aluminum automotive parts such as wheels, engine and transmission components are produced by tilted gravity die casting for control gas porosity. But, there are still problems resulting in inefficient production: shrinkage porosity, microstructure size and uniformity, and long solidification time. Shrinkage porosity is one of the major issues which affect mechanical properties such as strength and elongation in tilted pour permanent mold.

Recent work using slurry casting technique has shown potential in gravity sand casting. Results show that the casting parts complete filling at low solid fraction and the casting yield also higher than conventional gravity sand casting.

This paper extends important work for potential industrial applications in gravity die casting: cycle times, microstructure size, uniformity, solid fraction control for micro shrinkage level.

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15th International Conference on Semi-Solid Processing of Alloys and Composites

October22nd-24th, 2018, Shenzhen, China