Mičian Miloš, Winczek Jerzy, Gucwa Marek, Koňár Radoslav, Málek Miloslav, Postawa Przemysław
Department of Technological Engineering, Faculty of Mechanical Engineering, University of Žilina, 010 26 Žilina, Slovakia.
Department of Technology and Automation, Faculty of Mechanical Engineering and Computer Sciences, Czestochowa University of Technology, 42-201 Czestochowa, Poland.
Materials (Basel). 2020 Dec 11;13(24):5666. doi: 10.3390/ma13245666.
In this paper, the experimental investigation results of the bead sequence input on geometry, structure, and hardness of surfaced layers after multi-pass weld surfacing are analyzed. Three S355 steel plates surfaced by GMAW (Gas Metal Arc Welding) were tested with three different combinations of six beads. The geometric, structural, and hardness analysis was carried out in the cross-section of the plates in the middle of the welded layers. The dimensions of padded layers, fusion and heat-affected zone, as well as the individual padded weld were evaluated. On the basis of metallographic samples, qualitative and quantitative structure analysis was performed. Hardness measurements in surfacing welds and heat-affected zones in the tested cross-sections of the surfacing layers were carried out. A comparative analysis of structure and hardness, taking into account the thermal implications of the bead sequence, allowed for the formulation of conclusions. Comparative studies have shown differences in properties between heat-affected zones (HAZ) for individual surfacing sequences. These differences were mainly in the dimensions of the surfacing layers, the share of structural components, as well as the uniformity of hardness distributions. Finally, the most favorable sequence in terms of structure and hardness distribution, maximum hardness, and range of hardness has been indicated.
本文分析了多道堆焊后堆焊层的焊缝顺序对表面层几何形状、结构和硬度的实验研究结果。对三块采用气体保护金属电弧焊（GMAW）堆焊的S355钢板，用六种焊道的三种不同组合进行了测试。在焊层中部的钢板横截面上进行了几何、结构和硬度分析。评估了堆焊层、熔合区和热影响区的尺寸，以及单个堆焊焊缝的尺寸。基于金相试样，进行了定性和定量的结构分析。对堆焊层测试横截面中的堆焊焊缝和热影响区进行了硬度测量。考虑到焊道顺序的热影响，对结构和硬度进行对比分析，从而得出结论。对比研究表明，不同堆焊顺序的热影响区（HAZ）在性能上存在差异。这些差异主要体现在堆焊层的尺寸、结构成分的占比以及硬度分布的均匀性上。最后，指出了在结构和硬度分布、最大硬度以及硬度范围方面最有利的顺序。
