Miletić Ivan, Ilić Andreja, Nikolić Ružica R, Ulewicz Robert, Ivanović Lozica, Sczygiol Norbert
Faculty of Engineering, University of Kragujevac, 34000 Kragujevac, Serbia.
Research Center, University of Žilina, 01026 Žilina, Slovakia.
Materials (Basel). 2020 Mar 13;13(6):1301. doi: 10.3390/ma13061301.
This paper presents research of the impact toughness and hardness distribution in specific zones of a 'single V'butt multiple-pass welded joints of the high-strength low-alloyed steels. Obtained values of the impact toughness are analyzed in correlation with a microstructure in specific zones of the welded joint, together with the micro hardness distribution found in the related zones. Based on the carried out analysis and results obtained in experiments, the applied technology of welding was evaluated. The original conclusions on influence of the selected welding procedure manual metal arc (MMA) for the root passes and metal active gas (MAG) for the filling and covering passes) on impact toughness of the high-strength low-alloyed steels are drawn. The paper also presents discussion on the valid standards and recommendations related to welding of those steels, from the aspect of applications in design of steel welded constructions.
本文介绍了高强度低合金钢“单V”对接多道焊缝特定区域冲击韧性和硬度分布的研究。分析了所获得的冲击韧性值与焊接接头特定区域微观结构的相关性，以及相关区域的显微硬度分布。基于所进行的分析和实验结果，对所应用的焊接工艺进行了评估。得出了关于所选焊接工艺（根部焊道采用手工电弧焊（MMA），填充和盖面焊道采用活性气体保护焊（MAG））对高强度低合金钢冲击韧性影响的初步结论。本文还从这些钢材在钢结构焊接设计中的应用方面，对与这些钢材焊接相关的现行标准和建议进行了讨论。
