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A Study on the Joining of Different Al Alloys by Centrifugal Casting  

Jang, Young-Soo (Center for Computer-Aided Solidification Processing(CASP), Dept. of Metallurgical Engineering, Yonsei University)
Lee, Moon-Hyoung (Center for Computer-Aided Solidification Processing(CASP), Dept. of Metallurgical Engineering, Yonsei University)
Moon, Jun-Young (Center for Computer-Aided Solidification Processing(CASP), Dept. of Metallurgical Engineering, Yonsei University)
Hong, Chun-Pyo (Center for Computer-Aided Solidification Processing(CASP), Dept. of Metallurgical Engineering, Yonsei University)
Publication Information
Journal of Korea Foundry Society / v.27, no.6, 2007 , pp. 237-242 More about this Journal
Abstract
To improve the quality of the product and the cost efficiency, the joining of A356 alloy to an Al-18wt%Si alloys has been performed by centrifugal casting. The influence of the mold preheating temperature, the pouring temperature and the rotational velocity of the mold on the microstructures of the shell in the centrifugal casting was investigated using the experimental and simulation methods. In the present study, the cellular automaton (CA) technique and the finite volume method (FVM) were adopted to simulate the evolution of the macro structures and to calculate the temperature profiles, respectively. The evolution of the microstructures was also simulated using a modified cellular automaton (MCA) model. The optimal rotational speed of the mold for obtaining the sound shape of the shell was estimated experimentally to be over 1200 rpm. For the uniform microstructure, the outer shell needs to be cast with higher preheated mold temperature and lower pouring temperature, and the melt was poured at lower temperature in the inner shell. In order to obtain the sound shape of the joining, the different materials were poured simultaneously.
Keywords
Centrifugal casting; Joining; Cellular automaton; Finite volume method;
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1 Li Changyun et al. : Materials Processing Technology, 'Model experiment of mold filling process in vertical centrifugal casting', 176 (2006), 268-272   DOI   ScienceOn
2 M. Rappaz and Ch. A. Gandin: Acta Metall. Mater, 'Probabilistic modelling of microstructure formation in solidification processes', 41 (1993), 345   DOI   ScienceOn
3 Saburo sugiura, K. Yamano, S, Hayakawa, H. Yamazaki: Electric Furnace Steel. 52 (1981), 36
4 S. R. Jang: 'A Study on the Solidification Characteristics of Al Alloys in Vertical Centrifugal Casting' (Ph. D. thesis, Yonsei University, 2002), 13-16
5 K. Liu et al : Intermetallics, 'Single step centrifugal casting TiAI automotive valves', 13 (2005), 925-928   DOI   ScienceOn
6 W. Kurz, B. Giovanola, and R. Trivedi: Acta Metall, 'Theory of microstructural development during rapid solidification', 34 (1986), 823   DOI   ScienceOn
7 A. Halvaee and A. Talebi: Materials Processing Technology, 'Effect of process variables on microstructure and segregation in centrifugal casting of C92200 alloy', 118 (2001), 123-127