Brazing of high-strength steels: Recent developments and challenges

• DOI: 10.1016/j.jmapro.2024.02.011
• Publication Date: 2024-02-16T23:05:21Z
• Authors: Jaivindra Singh; Muhammad Shehryar...; J.P. Oliveira; Kanwer Singh Arora
• Keywords: Brazing; Fusion welding; Filler (materials)

Zinc-coated high-strength steels (HSS) and advanced (AHSSs) are widely employed in automobile body manufacturing owing to their impressive metallurgical mechanical characteristics. However, acquiring defect-free mechanically sound welding joints is still quite challenging due the formation of various defects, namely porosity, loss coating, evolution undesired microstructural phases both heat-affected zone fusion zone. The higher heat input during conventional processes tends exacerbate these challenges. Brazing, sometimes referred as weld-brazing, a comparatively new joining process that offers ability join thin zinc-coated steel sheets with significantly lower using compatible melting temperature filler wire, has been proposed an alternative fusion-based techniques. under-matching, i.e., weaker brazing than base metal, limits widespread application brazing. In this regard, several developments have reported overcome under-matching by changing composition, coating methodology. This comprehensive review highlights key challenges associated steel-to-steel brazing, while offering detailed survey methods can be used improve performance brazed joints.