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METALLURGICAL ASPECTS OF WELDABILITY OF MULTIPHASE STEELS FOR AUTOMOTIVE INDUSTRY

Authors:

M. Morawiec1

, A. Grajcar2

1Politechnika Śląska, Gliwice, Poland,
2Politechnika Śląska, Gliwice, Poland,

Received: 23.02.2017.
Accepted: 22.03.2017.
Available: 30.03.2017.

Abstract:

This paper presents some of technical aspects of the twin-spot laser welding of multiphase steels for automotive industry. The dual beam was obtained using a special optical system that divides a laser beam. The investigation was carried out in two main areas of welds, which are fusion and heat affected zones. The results show that in case of analyzed steels the use of twin-spot laser welding leads to changes in martensite morphology compared to single spot laser welding in both zones. The defragmented morphology suggests that tempering-like processes occur during the welding. This phenomenon causes the decrease in weld hardness compared to single spot laser welding.

Keywords:

Twin-spot, laser welding, multiphase steel, dual beam

References:

[1] K. Radwanski, A. Wrozyna, R. Kuziak, Role of the advanced microstructures characterization in modeling of mechanical properties of AHSS steels. Materials Science and Engineering: A, 639 (-), 2015: pp.567- 574.
[2] D. Krizan, K. Spiradek-Hahn, A. Pichler, Relationship between microstructure and mechanical properties in Nb-V microalloyed TRIP steel. Materials Science and Technology, 31 (6), 2015: pp.661-668.
[3] Z. Gronostajski, A. Niechajowicz, S. Polak, Prospects for the use of new-generation steels of the AHSS type for collision energy absorbing components. Archives of Metallurgy and Materials, 55(1), 2010: pp.221-230.
[4] D. Kuc, E. Hadasik, G. Niewielski, I. Schindler, E. Mazancova, S. Rusz, P. Kawulok, Structural and mechanical properties of laboratory rolled steels high-alloyed with manganese and aluminum. Archives of Civil and Mechanical Engineering, 12 (3), 2012: pp.312-317.
[5] A. Lisiecki, Welding of thermomechanically rolled fine-grain steel by different types of lasers. Archives of Metallurgy and Materials, 59 (4), 2014: pp.1625-1631.
[6] S.S. Nayak, E. Biro, Y. Zhou, Laser welding of advanced high-strength steels (AHSS), in: M. Shome, M. Tumuluru (Eds.), Welding and Joining of Advanced High Strength Steels (AHSS), Woodhead Publishing, 2015: pp.71-92.
[7] K. Banerjee, Improving weldability of an advanced high strength steel by design of base metal microstructure. Journal of Materials Processing Technology, 229 (-), 2016: pp.596-608.
[8] Y. Miyashita, Developments in twin-beam laser welding technology, in: S. Katayama (Ed.), Handbook of Laser Welding Technologies, Woodhead Publishing, 2013: pp.434-458.
[9] M. Morawiec, M. Różański, A. Grajcar, S. Stano, Effect of dual beam laser welding on microstructure-property relationships of hotrolled complex phase steel sheets. Archives of Civil and Mechanical Engineering, 17 (1), 2017: pp.145-153
[10] E. Capello, P. Chiarello, E. Piccione, B. Previtali, Analysis of high power CO2 dual beam laser welding, in: E. Kulianic (Ed.), Advanced Manufacturing System and Technology, Springer, 2002: pp.473-480.
[11] J. Milberg, A. Trautmann, Defect-free joining of zinc-coated steels by bifocal hybrid laser welding. Production Engineering Research and Development, 3 (1), 2009: pp.9-15.
[12] S. Yan, Z. Hong, T. Watanabe, T. Jingguo, CW/PW dual-beam YAG laser welding of steel/aluminum alloy sheets. Optics and Lasers in Engineering, 48 (7-8), 2010: pp.732- 736.
[13] M. Różański, M. Morawiec, A. Grajcar, S. Stano, Modified twin-spot laser welding of complex phases steel. Archives of Metallurgy and Materials, 61 (4), 2016: pp.1999-2008.
[14] A. Grajcar, M. Różański, M. Kamińska, B. Grzegorczyk, Study on non-metallic inclusions in laser-welded TRIP-aided Nbmicroalloyed steel. Archives of Metallurgy and Materials, 59 (3), 2014: pp.1163-1169.

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0)

Volume 9
Number 1
March 2024

Last Edition

Volume 9
Number 1
March 2024

How to Cite

M. Morawiec, A. Grajcar, Metallurgical Aspects of Weldability of Multiphase Steels for Automotive Industry. Applied Engineering Letters, 2(1), 2017: 38-42.

More Citation Formats

Morawiec, M., & Grajcar, A. (2017). Metallurgical Aspects of Weldability of Multiphase Steels for Automotive Industry. Applied Engineering Letters2(1), 38-42.

Morawiec, M., & A. Grajcar. “Metallurgical Aspects of Weldability of Multiphase Steels for Automotive Industry.“ Applied Engineering Letters, vol. 2, no. 1, 2017, pp. 38-42.

Morawiec, M., and A. Grajcar. 2017. “Metallurgical Aspects of Weldability of Multiphase Steels for Automotive Industry.“ Applied Engineering Letters, 2 (1): 38-42.

Morawiec, M. and Grajcar, A. (2017). Metallurgical Aspects of Weldability of Multiphase Steels for Automotive Industry. Applied Engineering Letters, 2(1), pp. 38-42.

METALLURGICAL ASPECTS OF WELDABILITY OF MULTIPHASE STEELS FOR AUTOMOTIVE INDUSTRY

Authors:

M.Morawiec1

, A.Grajcar2

1Politechnika Śląska, Gliwice, Poland,
2Politechnika Śląska, Gliwice, Poland,

Received: 23.02.2017.
Accepted: 22.03.2017.
Available: 30.03.2017.

Abstract:

This paper presents some of technical aspects of the twin-spot laser welding of multiphase steels for automotive industry. The dual beam was obtained using a special optical system that divides a laser beam. The investigation was carried out in two main areas of welds, which are fusion and heat affected zones. The results show that in case of analyzed steels the use of twin-spot laser welding leads to changes in martensite morphology compared to single spot laser welding in both zones. The defragmented morphology suggests that tempering-like processes occur during the welding. This phenomenon causes the decrease in weld hardness compared to single spot laser welding.

Keywords:

Twin-spot, laser welding, multiphase steel, dual beam

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0)

Volume 9
Number 1
March 2024

Last Edition

Volume 9
Number 1
March 2024