Venting Systems in Semi-Solid Processing of Aluminium

Abstract:

In the automotive industry, casting products produced by high pressure die casting are essential. Due to the higher mechanical demands on these castings, the technological requirements of the process are also increasing. Therefore, the control of the microstructure and the development of defects play a major role. High pressure die casting parts made of aluminium usually contain gas porosity due to gas compression during the filling process of the cavity and the intensification during solidification. The use of semi-solid casting thus opens new doors to fulfil promising future demands. In this study, the venting system was adapted to the Rheometal^TM process of aluminium and designed in the form of gaps, thus ensuring better venting. Subsequently, the results obtained were compared with casting process simulations to highlight possible differences.

• Periodical: Solid State Phenomena (Volume 348)
• Pages: 15-20
• DOI: https://doi.org/10.4028/p-zJNj1p
• Online since: August 2023
• Authors: Maria Pammer*, Peter Hofer-Hauser, Per Jansson
• Keywords: High Pressure Die Casting, RheoMetal^TM Process, Semi-Solid, Venting System

References

[1] A.C. Serrenho, J.B. Norman, J.M. Allwood, The impact of reducing car weight on global emissions: the future fleet in Great Britain, Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 375 (2017).

DOI: 10.1098/rsta.2016.0364

[2] S. Cecchel, D. Chindamo, M. Collotta, G. Cornacchia, A. Panvini, G. Tomasoni, M. Gadola, Lightweighting in light commercial vehicles: cradle-to-grave life cycle assessment of a safety-relevant component, Int J Life Cycle Assess 23 (2018) 2043–2054.

DOI: 10.1007/s11367-017-1433-5

[3] K. Anderson, J. Weritz, J.G. Kaufman (Eds.), Aluminum science and technology, ASM International, Materials Park, OH, 2018 400-408.

[4] S. Ji, K. Wang, X. Dong, An Overview on the Process Development and the Formation of Non-Dendritic Microstructure in Semi-Solid Processing of Metallic Materials, Crystals 12 (2022) 1044.

DOI: 10.3390/cryst12081044

[5] A.E. Jarfors, A.D. Di, G.G. Yu, J.C. Zheng, K.K. Wang, J. Wannasin, Semisolid Materials Processing: A Sustainability Perspective, Semi-Solid Processing of Alloys and Composites XII 327 (2022) 287–292.

DOI: 10.4028/www.scientific.net/ssp.327.287

[6] B.F. Nogovicyn, Theorie und Praxis des Druckgusses, Schiele & Schön GmbH, Berlin, 2011.

[7] William Walkington, Gas Prositiy - A Guide to Correcting the Problems, North American Die Casting Association.

[8] Genick Bar–Meir, Fundamentals of Die Casting Design, Free Software Foundation, Inc., Boston, 2012.

[9] A.E.W. Jarfors, A Comparison Between Semisolid Casting Methods for Aluminium Alloys, Metals 10 (2020) 1368.

DOI: 10.3390/met10101368