Lisiecki Aleksander, Kurc-Lisiecka Agnieszka, Pakieła Wojciech, Chrobak Grzegorz, Batalha Gilmar Ferreira, Adamiak Marcin
Department of Welding Engineering, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18A Str., 44-100 Gliwice, Poland.
Institute of Applied Sciences, WSB Merito University in Poznan, Sportowa 29 Str., 41-506 Chorzow, Poland.
Materials (Basel). 2024 Jul 11;17(14):3427. doi: 10.3390/ma17143427.
The article describes the results of the study on laser welding of armor plates with a nominal thickness of 3.0 mm. The plates were made of Armox 500T steel characterized by a hardness of up to 540 HB, a minimum yield strength of 1250 MPa, an ultimate strength of up to 1750 MPa, and an elongation A5 minimum of 8%. The laser used for the welding tests was a solid state Yb:YAG laser. The influence of basic parameters such as laser output power, welding speed, and focal plane position on the weld geometry was determined during bead-on-plate welding tests. The optimal conditions for butt joint welding were determined, and the test joints were subjected to mechanical and impact tests, metallographic analysis, and hardness measurements. It has been shown that it is possible to laser weld Armox 500T armor plates, and at the same time it is possible to provide high quality butt joints, but this requires precise selection of welding parameters. A decrease in HAZ hardness of about 22-35% in relation to the hardness of the base material, ranging from 470 to 510 HV0.2, was found. The ultimate tensile strength of the test joints was approx. 20% lower than the Armox 500T steel. The bending tests revealed the low plasticity of the tested joints because the bending angle was just 25-35°. The results of Charpy V-notch test revealed that the impact toughness of the weld metal at -20 °C was approx. 30% lower than at room temperature.
本文描述了对名义厚度为3.0毫米的装甲板进行激光焊接的研究结果。这些板材由Armox 500T钢制成，其硬度高达540 HB，最小屈服强度为1250 MPa，极限强度高达1750 MPa，伸长率A5最小值为8%。用于焊接试验的激光是固态Yb:YAG激光。在平板堆焊试验中确定了激光输出功率、焊接速度和焦平面位置等基本参数对焊缝几何形状的影响。确定了对接接头焊接的最佳条件，并对试验接头进行了力学和冲击试验、金相分析以及硬度测量。结果表明，可以对Armox 500T装甲板进行激光焊接，同时可以提供高质量的对接接头，但这需要精确选择焊接参数。发现热影响区硬度相对于母材硬度降低了约22 - 35%，母材硬度范围为470至510 HV0.2。试验接头的极限抗拉强度比Armox 500T钢低约20%。弯曲试验表明试验接头的塑性较低，因为弯曲角度仅为25 - 35°。夏比V型缺口试验结果表明，焊缝金属在-20°C时的冲击韧性比室温时低约30%。
