日期：2025年10月13日

时间：14:00-15:00

地点：J3

报告专家：Prof.Aleksander Lisiecki, Silesian University of Technology, Łukasiewicz – Upper Silesian Institute of Technology, Gliwice, Poland

主题：Experimental Study on Laser Welding of High-Strength Armor Plates Using Yb: YAG Laser（Yb: YAG激光高强装甲板焊接实验研究）

专家简介：Aleksander Lisiecki is Professor at Silesian University of Technology, vice-Head of Department of Welding Engineering and also Area leader in the Welding Technologies Research Group /ST/, Lukasiewicz Research Network – Upper Silesian Institute of Technology, Welding Center.The main area of his research and scientific activity (currently and in the past) of is related to the application and development of laser technologies in materials processing and joining, mainly laser welding, surface treatment, laser cladding, innovative hybrid methods for producing surface layers with high wear resistance and durability, and also hybrid methods of welding advanced high-strength steel and other nonferrous alloys. Other areas of research and teaching activity include arc and plasma welding and surfacing methods, engineering design, additive manufacturing methods, including SLS, SLM, LMD, WAAM and FDM and resin printers (for rapid prototyping), monitoring of welding and additive manufacturing processes, design and manufacturing of robotic manipulators, 3D scanners, experimental drones, quality control and quality assessment methods, including thermovision methods and measurements of thermal conditions. He is a co-author of 15 patents and 21 patent applications, author of a utility model in the field of construction engineering, author or co-author of over 250 publications, including monographs and chapters in monographs.

Aleksander Lisiecki教授任职于西里西亚理工大学，是焊接工程系副主任，同时担任卢卡谢维奇研究网络——上西里西亚技术研究所焊接中心焊接技术研究组（ST）的领域负责人。他的主要研究方向（包括当前与以往）涉及激光技术在材料加工与连接中的应用与发展，重点包括激光焊接、表面处理、激光熔覆、高耐磨和高耐久性表面层的创新混合制备方法，以及高强钢和其他有色合金的混合焊接技术。此外，他的科研与教学领域还涵盖电弧与等离子焊接及堆焊技术、工程设计、增材制造技术（包括SLS、SLM、LMD、WAAM、FDM以及用于快速原型制造的树脂打印）、焊接与增材制造过程的监测、机器人机械臂、三维扫描仪和实验无人机的设计与制造，以及质量控制与质量评估方法（包括热成像及热条件测量）。他拥有15项专利与21项专利申请，是建筑工程领域一项实用新型的发明人，并发表或合作发表了250余篇论文，其中包括多部专著及专著章节。

报告简介：The presentation will briefly describe the main research achievements and the areas of scientific and research activities. The areas of scientific and research activity of the Department of Welding Engineering at the Silesian University of Technology, as well as the Welding Centre ofUpper Silesian Institute of Technology will be discussed briefly. The results of exemplary research will also be presented in the field oflaser welding of armor plates with nominal thickness 3.0 mm. The plates of Armox 500T steel are characterized by hardness up to 540 HB, minimum yield strength 1250 MPa, ultimate strength up to 1750 MPa, and elongation A5 minimum 8%. The laser used for welding tests was 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 joints welding were determined, and the test joints were subjected to mechanical and impact test, metallographic analysis, and hardness measurements.

本报告将简要介绍主要的科研成果及研究方向。内容包括西里西亚理工大学焊接工程系及上西里西亚技术研究所焊接中心的主要科研领域。报告还将展示一项典型研究成果——名义厚度为3.0 mm的装甲钢板激光焊接实验结果。所用材料为Armox 500T钢，其硬度可达540 HB，屈服强度不低于1250 MPa，抗拉强度最高可达1750 MPa，断后伸长率A5不低于8%。焊接实验采用固体Yb:YAG激光器。通过在单道焊接实验中调控激光输出功率、焊接速度及焦平面位置等基本参数，分析了其对焊缝几何形貌的影响。进一步确定了对接焊的最佳工艺条件，并对焊接接头进行了力学性能测试、冲击试验、金相分析及硬度测量。