Enhanced ductility of strong cold-rolled ribbed rebar through intermediate frequency induction heat treatment based on recrystallization

In this study, intermediate frequency induction heat treatment (IFIHT) is applied to cold-rolled ribbed steel rebar with low-cost Q235 as raw material, and a combination of excellent ductility and high strength has been achieved, which surmounts the bottleneck of cold-rolled rebar. To reveal the mechanisms behind the excellent mechanical properties, multi-scale characterizations are carried out to study the microstructure and the micro-strain....