Abstract
This paper describes a rheo-forming process for the development of automobile suspension parts by using rheology material with electromagnetic stirring equipment. Generally, the liquid forging process takes place under high pressure of 1,000 bar. The productivity of the liquid forging is higher than that of the lower pressure die-casting. In order to improve mechanical properties, the rheology forging process by using medium pressure (<500 bar) with electromagnetic stirring equipment has been proposed for fabrication of rheology material with controlled solid fraction. From the analysis of filling and solidification, the die design of medium vertical forging process by electromagnetic stirrer equipment has been proposed for the development of an arm part. The microstructure and mechanical properties of suspension parts were investigated with and without heat treatment. Based on the microstructure, observation revealed the arm part with fine and spherodized α-Al phase particles. As a result, the uniform eutectic structure enhanced the mechanical properties of the suspension part.
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References
Shinobo O (1994) Research activities in Rheo Technology, Ltd. Proc of 3rd international conference on semi-solid processing of alloys and composites. Institute of Industrial Science University of Tokyo, Tokyo, Japan, 7–18
Kang CG, Seo PK, Jeon YP (2005) Thixo die-casting process for fabrication of thin-type component with wrought aluminum alloys and its formability limitation. J Mater Process Technol 160:59–69
Sukumaran K, Pai BC, Chakraborty M (2004) The effect of isothermal mechanical stirring on an Al-Si alloy in the semisolid condition. Mater Sci Eng 369:275–283
Kang CG, Seo PK, Son YI (2002) The effect of velocity control method on the part characteristic in semi-solid die casting. J Korean Soc Mech Eng A 10:2034–2043
Chairmetta G, Zanardi L (1996) Production of structural components by thixoforming aluminum alloys. Proc of the 4th international conference on semi-solid processing of alloys and composites. University of Sheffield, UK, 235–244
Young KP, Fitze R (1994) Semi-solid metal cast aluminum automotive components. Proc of 3rd Int conf on semi-solid processing of alloys and composites 155–176
Ko JH, Seo PK, Choi WS, Kang CG (2004) The grain size control of A356 aluminum alloy by electromagnetic stirring. The Korean Society for Technology of Plasticity in 2004: a collection of learned papers of science meeting in autumn, pp 111–114
Lim SC, Yoon EP (1996) The effect of fluid flow on the primary particle of Al-7wt%Si alloy in electromagnetic stirring. J Korea Foundrymen’s Soc 6:565–575
Laxmanan V, Flemings MC (1980) Deformation of semi-solid Sn-15 pct Pb alloy. Metall Trans A 11A:1927–1937
Kim NS, Kang CG (2000) An investigation of flow characteristics considering the effect of viscosity variation in the thixoforming process. J Mater Process Technol 103:237–246
Kang HG, Cheon BW, Choi CO (1993) AC4C research papers: the effect of casting condition and heat treatment on the mechanical properties of AC4C alloy castings. J Korea Foundrymen’s Soc 5:64–75
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Oh, S.W., Kang, C.G. Forging process of medium-pressure-type rheology materials fabricated with electromagnetic stirrer. Int J Adv Manuf Technol 38, 238–248 (2008). https://doi.org/10.1007/s00170-007-1096-7
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DOI: https://doi.org/10.1007/s00170-007-1096-7