Influence of wire electrode coatings on mechanical-technological weld seam and GMA-pocess properties

高强度和超高强度钢在许多技术领域的使用不断增加，其中包括海洋结构、汽车和一般钢结构，迫切需要对焊接工艺有更深入的了解，以便充分发挥其潜力。目前，在过程工程、过程自动化、过程控制等领域的研究较多，对实芯焊丝用于气体保护焊的研究较少。本研究项目的重点是，从假设不同金属和非金属元素的薄膜层到实心焊丝电极可以显著改变焊缝金属的力学和工艺性能以及焊接过程(熔透行为、材料转移和电弧)这一焊接领域开始。将表征不同层级系统的影响。重点研究了焊丝电极的电弧稳定性、熔滴过渡和燃烧行为，熔滴和焊缝中的元素分布，以及焊缝的静态、循环和动态力学性能。根据初步研究，预计涂层可以在工艺行为和力学性能方面实现显著变化。在研究项目的最后一步，将获得具有极大提高的目标性能(电弧稳定性/更精细的熔滴过渡、强度、韧性)的示范涂层系统，并将验证它们的预测性能。该研究项目将对了解弧焊过程做出重要贡献。

The increased use of high and ultra high strength steels in many areas of technology, among other things Offshore structures, automotive and general steel construction, the urge to grow a deeper understanding of welding processes in order to use their potentials completely. Currently, much research in the field of process engineering, process automation and process control is done; little attention is paid to solid wire electrodes for gas metal arc welding. The research project will focus, starting from the assumption that thin film layers of different metallic and non-metallic elements to solid wire electrodes can change the mechanical and technological properties of the weld metal and the welding process (penetration behavior, material transfer and arcing) significantly, this part of the field of welding. The influences of different layer systems will be characterized. The arc stability, the droplet transfer and the combustion behavior of the wire electrode and the element distribution in the droplet and the weld in addition to the static, cyclic and dynamic mechanical properties of the weld seam are the focus of the investigations. Based on preliminary studies, it is expected that a significant change in the process behavior and the mechanical properties can be achieved by the coating. In the last step of the research project demonstration coating systems will be derived with greatly increased targeted properties (arc stability / finer droplet transfer, strength, toughness) and their predicted properties will be verified. The research project will contribute a significant part in the understanding of arc welding processes.