Optimized welding processes for the repair and strengthening of structures made of old mild steels

When repairing or reinforcing existing structures made of old mild steel, the preferred joining method may be welding rather than bolting, as is usually case. Due to specific properties steels, special problems have considered. The weldability steels particularly influenced by their highly scattering chemical composition, inclusions and distribution in component well limited material toughness. first results a research project at Dresden University Applied Sciences concerning rimmed already been presented Eurosteel 2017. This paper presents findings continued investigations, e.g. use other filler materials out-of-position welding. parameters were adjusted so that toughness HAZ better unaffected base material. Additionally, suitability flux-cored wire was investigated. process enables more economical production large seam lengths. Unfortunately, realized are very stringent, higher energy density this quickly leads coarse grain formation thus reduction