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Brazing of high-strength steels

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Resumo:Zinc-coated high-strength steels (HSS) and advanced high-strength steels (AHSSs) are widely employed in automobile body manufacturing owing to their impressive metallurgical and mechanical characteristics. However, acquiring defect-free and mechanically sound welding joints is still quite challenging due to the formation of various defects, namely porosity, loss of coating, and the evolution of undesired microstructural phases in both the heat-affected zone and the fusion zone. The higher heat input during conventional fusion welding processes tends to exacerbate these challenges. Brazing, sometimes referred to as weld-brazing, is a comparatively new joining process that offers the ability to join thin and zinc-coated steel sheets with a significantly lower heat input using a compatible lower melting temperature filler wire, has been proposed as an alternative to fusion-based joining techniques. However, under-matching, i.e., mechanically weaker brazing filler than that of the base metal, limits the widespread application of brazing. In this regard, several developments have been reported to overcome under-matching by changing the filler composition, coating composition, and joining methodology. This comprehensive review highlights the key challenges associated with steel-to-steel brazing, while offering a detailed survey of various methods that can be used to improve the performance of brazed joints.
Autores principais:Singh, Jaivindra
Outros Autores:Khan, Muhammad Shehryar; Oliveira, J. P.; Arora, Kanwer Singh
Assunto:Bead shape Intermetallic phases Joint strength Non-fusion joining techniques Weld-brazing Strategy and Management Management Science and Operations Research Industrial and Manufacturing Engineering
Ano:2024
País:Portugal
Tipo de documento:recensão
Tipo de acesso:acesso aberto
Instituição associada:Universidade Nova de Lisboa
Idioma:inglês
Origem:Repositório Institucional da UNL

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