Influence of surface pressure and tool materials on contact heating of aluminum
TRÂN Ricardo, PSYK Verena, WINTER Sven, KRÄUSEL Verena
download PDFAbstract. The implementation of lightweight design concepts can significantly benefit from using highly efficient heating technologies such as contact heating in thermo-mechanical processing of sheet metal components. The investigation of the influence of surface pressure and tool material on the heating time and the heating rate during contact heating is the subject of this publication. A specially manufactured contact heating tool with comprehensive temperature and force measurement was used for studying the effects of different contact plate materials (CuZn39Pb3 and CuCr1Zr), surface pressures (3 MPa – 15 MPa) and variable plate thicknesses (1.0 mm – 5.2 mm) during heating of the aluminum alloy EN AW-7075 up to the solution heat treatment temperature of 475 °C. It was observed that heating time is lower for thinner workpieces. Furthermore, heating times decrease and heating rates increase significantly with increasing surface pressure for a pressure range of 3 MPa – 9 MPa. A further increase in surface pressure is not recommended, because the benefit in terms of further reduction of the heating time is marginal and the strength of the contact plate materials at elevated temperatures is limited. Contact heating using copper plates is significantly faster compared to brass plates and the conventionally used steel plates. Brass plates, however, benefit more from an increase in surface pressure. Both investigated materials allow faster heating than conventional steel plates due to their higher thermal conductivity. Depending on the specific process parameters the heating process can be accelerated to less than one second. Thus, contact heating can be realized within the press cycle.
Keywords
Heating Technology, Contact Heating, Aluminum, Hot Forming, Tool Technology
Published online 4/19/2023, 10 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: TRÂN Ricardo, PSYK Verena, WINTER Sven, KRÄUSEL Verena, Influence of surface pressure and tool materials on contact heating of aluminum, Materials Research Proceedings, Vol. 28, pp 959-968, 2023
DOI: https://doi.org/10.21741/9781644902479-105
The article was published as article 105 of the book Material Forming
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
References
[1] M. Hanna, J. Schwenke, L.-N. Schwede, F. Laukotka, D. Krause, Model-based application of the methodical process for modular lightweight design of aircraft cabins, Procedia CIRP 100 (2021) 637-642. https://doi.org/10.1016/j.procir.2021.05.136
[2] C. Koffler, K. Rohde-Brandenburger, On the calculation of fuel savings through lightweight design in automotive life cycle assessments, Int. J. Life Cycle Assess. 15 (2010) 128-135. https://doi.org/10.1007/s11367-009-0127-z
[3] Q. Liu, Y. Lin, Z. Zong, G. Sun, Q. Li, Lightweight design of carbon twill weave fabric composite body structure for electric vehicle, Compos. Struct. 97 (2013) 231-238. https://doi.org/10.1016/j.compstruct.2012.09.052
[4] C.M. Light, P.H. Chappell, Development of a lightweight and adaptable multiple-axis hand prosthesis, Med. Eng. Phys. 22 (2000) 679-684. https://doi.org/10.1016/s1350-4533(01)00017-0
[5] N. Modler, A. Winkler, A. Filippatos, D. Weck, M. Dannemann, Function-integrative Lightweight Engineering – Design Methods and Applications, Chemie Ingenieur Technik 92 949-959. https://doi.org/10.1002/cite.202000010
[6] Z. Tang, Z. Gu, L. Jia, X. Li, L. Zhu, H. Xu, G. Yu, Research on Lightweight Design and Indirect Hot Stamping Process of the New Ultra-High Strength Steel Seat Bracket, Metals 9 (2019) 833. https://doi.org/10.3390/met9080833
[7] M. Linnemann, V. Psyk, N. Kaden, F. Kersten, M. Schmidtchen, V. Kräusel, M. Dix, U. Prahl, Producing and Processing of Thin Al/Mg/Al Compounds, Eng. Proc. 26 (2022) 8. https://doi.org/10.3390/engproc2022026008
[8] H. Karbasian, A.E. Tekkaya, A review on hot stamping, J. Mater. Process. Technol. 210 (2010) 2103-2118. https://doi.org/10.1016/j.jmatprotec.2010.07.019
[9] S. Winter, M. Werner, R. Haase, V. Psyk, S. Fritsch, M. Böhme, M. Wagner, Processing Q&P steels by hot-metal gas forming: Influence of local cooling rates on the properties and microstructure of a 3rd generation AHSS, J. Mater. Process. Technol. 293 (2021) 117070. https://doi.org/10.1016/j.jmatprotec.2021.117070
[10] R. Trân, F. Reuther, S. Winter, V. Psyk, Process development for a superplastic hot tube gas forming process of titanium (Ti-3Al-2.5V) hollow profiles, Metals 10 (2020). https://doi.org/10.3390/met10091150
[11] K. Mori, S. Maki, Y. Tanaka, Warm and hot stamping of ultra tensile strength steel sheets using resistance heating, CIRP Annals—Manuf. Technol. 54 (2009) 209-212.
[12] R. Kolleck, R. Veit, M. Merklein, J. Lechler, M. Geiger, Investigation on induction heating for hot stamping of boron alloyed steels, CIRP Annals—Manuf. Technol. 58 (2009) 275-278.
[13] R. Kolleck, R. Veit, H. Hofmann, F.J. Lenze, Alternative heating concepts for hot sheet metal forming, 1st International Conference on Hot Sheet Metal Forming of High-Performance Steel, Kassel, Germany, 2008, pp. 239-246.
[14] V. Ploshikhin, A. Prihodovsky, J. Kaiser, R. Bisping, H. Linder, C. Lengsdorf et al., New heating technology for furnace-free press hardening process, Tools and Technologies for Processing Ultra-High Strength Materials, Graz, Austria, 2011.
[15] D. Landgrebe, F. Schieck, J. Schönherr, New Approaches for Improved Efficiency and Flexibility in Process Chaines of Press Hardening, International Mechanical Engineering Congress & Exposition (ASME), Houston/Texas, USA, 13 – 19.11.2015.
[16] J.N. Rasera, K.J. Daun, C.J. Shi, Direct contact heating for hot forming die quenching, Appl. Therm. Eng. 98 (2016) 1165-1173.
[17] R. Trân, L. Kertsch, S. Marx, S. Hebbar, V. Psyk, A. Butz, Towards an efficient Industrial Implementation of W-temper Forming for 7xxx Series Al Alloys, in: G. Daehn, J. Cao, B. Kinsey, E. Tekkaya, A. Vivek, Y. Yoshida (Eds.), Forming the Future, Cham: Springer International Publishing, 2021.
[18] C. Hoff, Untersuchungen der Prozesseinflussgrößen beim Presshärten des höchstfesten Vergütungsstahls 22MnB5, Dissertation, Universität Erlangen-Nürnberg, 2007.
[19] W. Xiao, B. Wang, K. Zheng, J. Zhou, J. Lin, A study of interfacial heat transfer and its effect on quenching when hot stamping AA7075, Arch. Civil Mech. Eng. 18 (2018) 723-730. https://doi.org/10.1016/j.acme.2017.12.001
[20] A.A.M. Smeyers, S. Khosla, Production of formed automotive structural parts from AA7xxx-series aluminium alloys, European Patent EP 2 581 218 B1, 2012.
[21] S. Spigarelli, M. El Mehtedi, M. Cabibbo, F. Gabrielli, D. Ciccarelli, High temperature processing of brass: Constitutive analysis of hot working of Cu-Zn alloys, Mater. Sci. Eng. A 615 (2014) 331-339. https://doi.org/10.1016/j.msea.2014.07.091
