Abstract
In this paper spot-welding technology of sheets made of Dual-Phase (DP) steel, which are one of the most important materials in the automotive industry, has been analyzed with experimental research and finite element modelling. Besides conventional mild steels that have been dominant for decades in automobile production, the application of advanced high-strength steels (AHSS) comes into focus. Among the first generation AHSS, DP steels are of the utmost importance concerning their automotive use. In Hungary a lot of small and medium sized enterprises function as the suppliers of the big automakers settled in our country. Nowadays these enterprises, besides the welding of conventional mild steel parts, often have the task of joining ferrite-martensitic DP steels with spot welding. During the spot welding of DP steels, when using the technology familiar with mild steels, the risk of hardening, the unfavourable failure of the joint or even cracking during operation must be taken into account, therefore welding technology must be planned on different theoretical bases. The traditional, continuous energy input and the symmetric double pulse as the non-continuous energy input were compared for resistance spot welding, focused on the advantages of pulsed energy input. For numerical analysis an axisymmetric coupled finite element model (FEM) is developed to study the effect of welding time and current intensity on nugget size and thermal history in resistance spot welding process using MSC.Marc software package. The cross-section macrostructures of the welded specimens are examined and compared to the predicted size of the weld nugget and heat affected zone (HAZ). Shear testing, cross tension testing, peel testing and hardness measurements are also performed on specimens for each welding process to examine the effect of the changes in different welding parameters on the load bearing capacity of the joint.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsReferences
H. World Steel Association (2009) Advanced high strength steel (AHSS) application guidelines, Version 4.1, pp 1–16
Prém L (2014) Spot welding experiments of automotive Dual-Phase steel sheets. Publications of the MultiScience. In: Proceedings 28th microCAD, international multidisciplinary scientific conference, University of Miskolc (Hungary)
Weman K (2003) Welding process handbook. Woodhead Publishing Ltd and CRC Press LLC
Janota M, Neumann H (2008) Share of spot welding and other joining methods in automotive production. Welding in the World
IIW White Paper (2012) Improving global quality of life through optimum use and innovation of welding and joining technologies, p 36
Advances in high strength steels for automotive applications, www.wordautosteel.org
ASM Handbook (2005) Properties and selection: irons, steels, and high performance alloys, 10th edn., vol 1, p 697
Tsipouridis P (2006) Mechanical properties of dual phase steels, PhD dissertation, Technische Universität, München (Germany)
Dziedzic M, Turczyn S (2010) Experimental and numerical investigation of strip rolling from dual phase steel. Arch Civil Mech Eng 10(4):21–30
Tisza M (2015) Material and technological developments in sheet metal forming with special regards to the needs of the automotive industry. Arch Mater Sci Eng 71(1):36–45
DOCOL advanced high strength steels for automotive industry, www.ssab.com
Bézi Z, Prém L, Balogh A (2016) Development of resistant spot welding technology for automotive ferrite-martensitic dual-phase steels with joint application of finite element modelling and experimental research. Adv Mater Res 1138:43–48
Oikawa H, Sakiyama T, Ishikawa T, Murayama G, Takahashi Y (2007) Resistance spot weldability of high strength steel (HSS) sheets for automobiles. Nippon Steel Technical Report, No. 95
SSAB: welding of AHSS/UHSS steel. A guide for the automotive industry
Prém L, Balogh A (2015) Symmetric double pulse with increased intermediate time for resistance spot welding of ferrite-martensitic DP steel series. In: Young welding professionals international conference, YPIC 2015, Budapest (Hungary)
Khan MI, Kuntz ML, Biro E, Zhou Y (2008) Microstructure and mechanical properties of resistance spot welded advanced high strength steels. Mater Trans 49(7):1629–1637
Bézi Z, Baptiszta B, Szávai Sz (2014) Experimental and numerical analysis of resistance spot welded joints on DP600 sheets. BID-ISIM welding and material testing 23(4):7–12
Khan I, Kuntz M, Zhou Y, Chan K (2007) Monitoring the effect of RSW pulsing on AHSS using FEA (SORPAS) software. SAE Technical Paper 2007-01-1370
Acknowledgements
The research work presented in this paper based on the results achieved within the TÁMOP-4.2.1.B-10/2/KONV-2010-0001 project and carried out as part of the TÁMOP-4.2.2.A-11/1/KONV-2012-0029 project in the framework of the New Széchenyi Plan. The realization of this project is supported by the European Union, and co-financed by the European Social Fund.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2017 Springer International Publishing AG
About this paper
Cite this paper
Prém, L., Bézi, Z., Balogh, A. (2017). Development of Complex Spot Welding Technologies for Automotive DP Steels with FEM Support. In: Jármai, K., Bolló, B. (eds) Vehicle and Automotive Engineering. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-319-51189-4_36
Download citation
DOI: https://doi.org/10.1007/978-3-319-51189-4_36
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-51188-7
Online ISBN: 978-3-319-51189-4
eBook Packages: EngineeringEngineering (R0)