HeatWeldForming - combined thermomechanical property improvement of welding seams

该研究项目的总体目标是有目的地将预热、焊接、成型和后加热等各个过程结合起来，以实现焊缝和热影响区有针对性的微观结构调整。从第一个提案阶段开始，就出现了焊接和热成型结合不完全可能的情况。在这方面，现有的在线工艺链将通过预热和后加热单元进行扩展。这种延伸最终有助于在焊缝和热影响区的区域中进行有针对性的微观结构调整。此外，扩展的在线工艺链能够加工热机械轧制的细晶粒结构钢，旨在消除或减少由于焊接工艺而发生的所谓软化区中的软化效应。在本项目的范围内，将开发对各个过程的复杂相互作用的基本理解，以刺激有针对性的局部微观结构转变过程并引入材料硬化。

The overall objective of this research project is the purposeful combination of the individual processes of pre-heating, welding, forming and post-heating in order to achieve a targeted microstructure adjustment in the weld seam and the heat-affected zone. From the first proposal phase it emerged that this is not fully possible with the combination of welding and hot forming. In this respect, the existing inline process chain will be extended by a pre-heating and post-heating unit. This extension ultimately facilitates a targeted microstructure adjustment in the area of the weld seam and heat-affected zone. Furthermore, the extended inline process chain enables the processing of thermomechanically rolled fine-grained structural steels, aiming to eliminate or reduce the softening effect in the so-called softening zone which occurs as a result of the welding process. Within the scope of this project, a basic understanding of the complex interaction of the individual processes will be developed to stimulate targeted local microstructure transformation processes and to introduce material hardening.