Effect of partial and full austenitisation on microstructure and mechanical properties of quenching and partitioning steel

A novel high-strength steel has been made through thermo-mechanical controlled processing with the finish rolling temperature of 750 °C followed by air cooling. Subsequently, both partial austenitisation at 800 °C and fully austenitisation at 930 °C have been attempted for equal duration of 30 min prior to one step quenching and partitioning (Q&P) at 345 °C below MS temperature (365 °C). As-rolled steel reveals ferrite-bainite-martensite...