HeatWeldForming - combined thermomechanical property improvement of welding seams

本研究项目的总体目标是有目的地将预热、焊接、成形和后热的各个工艺相结合，以便在焊缝和热影响区实现有针对性的组织调整。从第一个提议阶段可以看出，焊接和热成形的结合并不完全可能做到这一点。在这方面，现有的直列式加工链将通过预热和后热装置来延长。这种延伸最终有助于在焊缝和热影响区区域进行有针对性的微观结构调整。此外，延长的直列式工艺链能够加工热机械轧制的细晶结构钢，旨在消除或减少焊接过程中出现的所谓软化区的软化效应。在本项目的范围内，将对各个过程的复杂相互作用形成基本的了解，以刺激有针对性的局部微结构转变过程，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.