Journals →  Tsvetnye Metally →  2017 →  #5 →  Back

METAL PROCESSING
ArticleName Optimization of technological modes of laser welding overlapping the sheets made of aluminum alloy AMg2M with steel St3
DOI 10.17580/tsm.2017.05.14
ArticleAuthor Lyukhter A. B., Shlegel А. N.
ArticleAuthorData

Vladimir State University, Vladimir, Russia:

A. B. Lyukhter, Rectorate Councellor

 

LLC “Novye tekhnologii lazernogo termouprochneniya”, Vladimir, Russia:
А. N. Shlegel, Head of Laser Production, e-mail: shlegel@laser33.ru

Abstract

Creation of a new generation of vehicles running on electric actuators associates with the problem of weight loss. This is necessary in order to achieve the dynamic performance comparable to the vehicles running on petrol or diesel fuel and increase speed. The problem is solved by reducing the total body weight or the individual housing parts using the lightweightmaterials such as aluminum. The use of aluminum alloy cladding in combination with a steel frame allows to improve the corrosion resistance and to reduce the vehicles weight significantly. Currently, steel is combined with aluminum by gluing, mechanically using rivets and welding. The progressive method of joining dissimilar material is laser welding, which is an indispensable tool due to the high degree of automation and the possibility of wide regulation of technological modes. Due to optimization of technological modes of laser welding it is possible to achieve high levels of durability of welded connection to alternating dynamic breaking load. The work is dedicated to the optimization of technological modes of laser welding of aluminum alloy sheets and structural steels. Welding was performed on laser robot systems consisting of ytterbium fiber laser with a power of 3 kW, and 6-axis robot arm with a positioning accuracy of ±0.07 mm. We defined the criteria of optimum parameters of technological modes of laser welding overlapped. The studies were aimed at determining the tensile strength, ductility, and discontinuity of the welded joint, depending on the technological parameters of laser welding lapped on the example of samples of aluminum alloy AMg2M and steel St3. We obtained the physical and mechanical properties of welds to get close to the alloy AMg2M. The optimal technological laser welding modes overlap the following pairs of welded joints having different thicknesses: ST3 + AMg2M, 3.0/3.0 mm; ST3 + AMg2M, 1.5/3.0 mm. We choose the most effective forms of welded joints capable of resisting shear on 360о.

keywords Laser beam welding of the lap joints, aluminum alloy, steel, fracture load, technological modes, mechanical shear tests, tensile shear strength, structural analysis, optimization
References

1. Schubert E., Klassen M., Zerner I., Walz C., Sepold G. Light-weight structures produced by laser beam jointing for future applications in automobile and aerospace industry. Journal of materials processing technology. 2001. Vol. 115. pp. 2–8.
2. Schimek M., Springer A., Kaierle S., Kracht D., Wesling V. Laser-welded dissimilar steel-aluminum seams for automotive light weight construction. Physics Procedia. 2012. Vol. 39. pp. 43–50.
3. Chen H. C., Pinkerton A. J., Li L., Liu Z., Mistry A. T. Gap-free fibre laser welding of Zn-coated steel on Al alloy for light-weight automotive applications. Materials and Design. 2011. Vol. 32. pp. 495–504.
4. Pardal G., Meco S., Ganguly S., Williams S., Prangnell P. Dissimilar metal laser spot joining of steel to aluminium in conduction mode. The International Journal of Advanced Manufacturing Technology. 2014. Vol. 73. pp. 365–373.
5. Meco S., Pardal G., Ganguly S., Williams S., McPherson N. Application of laser in seam welding of dissimilar steel to aluminium joints for thick structural components. Optics and Lasers in Engineering. 2015. Vol. 67. pp. 22–30.
6. Ghassemieh E. Materials in automotive application, state of the art and prospects. New Trends and Developments in Automotive Industry. Ed. Chiaberge. Rijeka, Croatia : InTech, 2011. pp. 365–394.
7. Kalaiselvan K., Elango A. Studies of interfacial microstructure and mechanical properties on dissimilar sheet metal combination joints using laser beam welding. International Scholarly and Scientific Research & Innovation. 2014. Vol. 8, No. 11. pp. 1865–1872.
8. Lee K. J., Shinji Kumai, Takashi Arai. Interfacial microstructure and strength of steel to aluminum alloy lap joints welded by a defocused laser beam. Materials Transactions. 2005. Vol. 46, No. 8. pp. 1847–1856.
9. Windmann M., Röttger A., Kügler H., Theisen W., Vollertsen F. Laser beam welding of aluminum to Al-base coated high-strength steel 22MnB5. Journal of Materials Processing Technology. 2015. Vol. 217. pp. 88–95.
10. Regulatory Guide RD 26-11-08–86. Welded joints. Mechanical tests. Introduced: 1987–01–01.
11. ISO 13919-2:2001. Welding. Electron and laser beam welded joints. Guidance on quality levels for imperfections. Part 2: Aluminium and its weldable alloys. Publ. 1996–08–01. Rev. 2011–12–20.
12. Shiganov I. N., Shakhov S. V., Kholopov A. A. Laser welding of aluminium aviation alloys. Vestnik MGTU imeni N. E. Baumana. Seriya “Mashinostroenie”. 2012. No. 6. pp. 34–50.
13. Lyukhter A. B., Valuyskikh V. P., Skvortsov K. V. Lap mount device for welded joints during the static tension. Patent RF, No. 161588. Applier and patent-holder: Vladimir State University. Applied: 29.12.2015. Published: 06.04.2016.
14. Shlegel A. N., Evtikheev N. N., Gusev D. S., Ivanchenko A. B. Modeling of butt and lap joint laser welding of aluminum alloys and constructional steel sheets. Non-ferrous Metals. 2016. No. 1. pp. 27–32. DOI: 10.17580/nfm.2016.01.05
15. State Standard GOST 6996–66. Welded joints. Methods of mechanical properties determination. Introduced: 1967–01–01.
16. State Standard GOST 10243–75. Steel. Methods of test and estimation of macrostructure. Introduced: 1978–01–01.
17. State Standard GOST 1778–70. Steel. Metallographic methods for the determination of nonmetallic inclusions. Introduced: 1972–01–01.

Language of full-text russian
Full content Buy
Back