Communications - Scientific Letters of the University of Zilina 2017, 19(3):109-114 | DOI: 10.26552/com.C.2017.3.109-114

Selecting the Low Alloy-Tempered Steel for Manufacturing the Highly Loaded Responsible Parts

Vukic Lazic1, Dusan Arsic1, Ruzica R. Nikolic2, Miodrag Arsic3, Branislav Hadzima4
1 Faculty of Engineering, University of Kragujevac, Serbia
2 Faculty of Engineering, University of Kragujevac, Serbia and Research Center, University of Zilina, Slovakia
3 Institute for testing of materials - IMS, Belgrade, Serbia
4 Research Center, University of Zilina, Slovakia

The selecting procedure of the optimal material for manufacturing the highly loaded responsible parts for military applications is presented in this paper. The considered part is in exploitation subjected to complex compressive-impact loading and cyclically to high temperatures, as well. The proper selection of material can be done exclusively based on the theoretical and experimental analysis of properties of the steel in question. The theoretical and experimental selecting of adequate steel for manufacturing such parts is done based on requirements arising from their working conditions. Based on the available data for various steels, chemical composition, mechanical and technological properties, available CCT diagram, the optimal steel was selected for the given working conditions. After the selection of the material, experimental investigations on specially prepared material samples were conducted. The real chemical composition of material was established, its most important mechanical properties were determined, the hardness was measured and the microstructure was determined, as well. After the conducted theoretical and experimental investigations, the responsible machine part was manufactured from the selected material by forging. Then, the mechanical and heat processing was executed, after which the part was tested in the real working conditions. Based on investigations of part's behavior in the real working conditions, it was concluded that the selection of the material was adequate.

Keywords: low-alloyed steel; mechanical properties; microstructure; machine parts

Published: September 30, 2017  Show citation

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Lazic, V., Arsic, D., Nikolic, R.R., Arsic, M., & Hadzima, B. (2017). Selecting the Low Alloy-Tempered Steel for Manufacturing the Highly Loaded Responsible Parts. Communications - Scientific Letters of the University of Zilina, 19(3), 109-114. doi: 10.26552/com.C.2017.3.109-114
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