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Weldability and Impact Energy Properties of High-Hardness Armor Steel

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Abstract

In this study, the weldability of high-hardness armor steel by the gas metal arc welding method has been investigated. The study was aimed at determining the weakness points of manual welding compared to automated welding through microhardness testing, the cooling rate, tensile characteristics and nondestructive analysis. Detailed studies were performed for automated welding on the impact energy and microhardness in the fusion line, as the most sensitive zone of the armor steel weld joint. It was demonstrated that the selection of the preheating and interpass temperature is important in terms of the cooling rate and quantity of diffusible and retained hydrogen in the weld joint. The tensile strength was higher than 800 MPa. The width of the heat-affected zone did not exceed 15.9 mm, measured from the weld centerline, while the impact energy results were 74 and 39 J at 20 and – 40 °C, respectively.

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Acknowledgments

The authors would like to thank Dr. Zijah Burzic and the Military Technical Institute for mechanical testing. This study was financially supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia through Project No. ON 174004.

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Authors and Affiliations

  1. Faculty of Technical Sciences, University of Novi Sad, Trg D. Obradovića 6, Novi Sad, 21000, Serbia

    Aleksandar Cabrilo & Katarina Geric

  2. Welding Institute, Ptujska 19, 1000, Ljubljana, Slovenia

    Milos Jovanovic

  3. Faculty of Engineering, University of Kragujevac, Sestre Janjic 6, Kragujevac, 34000, Serbia

    Lazic Vukic

Authors
  1. Aleksandar Cabrilo
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  2. Katarina Geric
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Correspondence to Aleksandar Cabrilo.

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Cabrilo, A., Geric, K., Jovanovic, M. et al. Weldability and Impact Energy Properties of High-Hardness Armor Steel. J. of Materi Eng and Perform 27, 1281–1295 (2018). https://doi.org/10.1007/s11665-018-3211-3

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  • DOI: https://doi.org/10.1007/s11665-018-3211-3

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