Reseacrh and Education Center of Laser Technologies Implementation (Vladimir State University), Vladimir. Russia:

A. B. Lyukhter, University Administration Councellor

A. A. Leontev, Engineer-researcher, e-mail: leontev@laser33.ru

Vladimir State University named after Alexander and Nikolay Stoletovs, Vladimir, Russia:

A. N. Shlegel, Head of Laser Production

LLC “Vladimir Engineering Center of Laser Technologies Use in Mechanical Engineering (Vladimir State University)”, Vladimir, Russia:

D. S. Gusev, Head of Scientific-Experimental Department

Nowadays, detail obtaining technologies by welding of ferrous and nonferrous metals are the most popular both in automobile industry and in other branches of industry. Such welded joint offers the possibility of not only making the auto design lighter, but also protecting it from corrosion. Methods of jointing of dissimilar metals are various, but their main problems are appearance depreciation and high cost of manufacturing technology. We discuss the sample materials, manufactured with laser welding by fiber laser. A main advantage of laser welding of aluminium and steel by the considered method is the absence of filler wire, buckling and change of appearance of the face of bus body elements. Our article finds the mechanical data limits of buses’ body models, made of steel section St3 (Ст3) and sheet aluminium AMg2M by laser welding. We tested the static and fatigue mechanical properties and showed the method of their behavior. As a result of these researches, we found the mechanical characteristics of the manufactured sample materials. On the basis of the obtained results, taking into account the rectifications, a real transport vehicle body was created for in situ tests. Our article also shows that laser welding of buses’ bodies made of dissimilar metals allows the obtaining of strength characteristics, required and sufficient for provision of safe exploitation of transport vehicles.

1. Martinsena K., Huc S. J., Carlsond B. E. Joining of dissimilar materials. CIRP Annals — Manufacturing Technology. 2015. Vol. 64. pp. 679–699.
2. Abdo A. et al. Resistance spot welding of aluminium. International Journal for Scientific Research & Development. 2013. Vol. 10. pp. 2212–2216.
3. Chen H. Gap-free bre laser welding of Zn-coated steel. Materials & Design. 2011. Vol. 32. pp. 495–504.
4. Dharmendra C. et al. Study on laser welding-brazing of zinc coated steel. Materials Science and Engineering: A. 2011. Vol. 528. pp. 1497–1503.
5. Mehrani A. Influence of filler wire 5754 aluminum alloy in a lapjoint configuration. The International Journal of Advanced Manufacturing Technology. 2016. Vol. 82. pp. 1495–1506.
6. Wang Pengfei, Xizhang Chen, Qiuhong Pan, Bruce Madigan, Jiangqi Long. Laser welding dissimilar materials of aluminum to steel: an overview. The International Journal of Advanced Manufacturing Technology. 2016. Vol. 87. pp. 3081–3090.
7. Tasalloti H. et al. Laser overlap welding of zinc-coated steel on aluminum alloy. Physics Procedia. 2015. Vol. 78. pp. 265–271.
8. Dharmendra C., Rao K. P., Wilden J., Reich S. Study on laser weldingbrazing of zinc coated steel to aluminum alloy with a zinc based filler. Materials Science and Engineering: A. 2011. Vol. 528. pp. 1497–1503.
9. Choi C. Y., Kim D. C., Nam D. G., Kim Y. D., Park Y. D. A hybrid joining technology for aluminum/zinc coated steels in vehicles. Journal of Materials and Science Technologies. 2010. Vol. 26. pp. 858–864.
10. State Registration Certificate of Computer Program No. 2015612905. Subsystem of interaction with hardware of laser welding complex. Shamin P. Yu., Prokoshev V. G., Lyukhter A. B. Copyright holder: Vladimir State University named after Alexander and Nikolay Stoletovs. Applied: 13.04.2015. Published: 20.06.2015.
11. GOST R 41.66–99. Uniform provisions concerning the approval of large passenger vehicles with regard to the strength of their superstructure. State Standard. Moscow : Izdatelstvo standartov, 2004. 19 p.
12. GOST 30630.1.1–99. Mechanical environment stability test methods for machines, instruments and other industrial products. Determination of dynamic characteristics of structure. State Standard. Moscow : Izdatelstvo standartov, 2001. 17 p.
13. 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 (40). pp. 27–32.