This study focuses on the effect of non-conventional annealing strategies microstructure and related mechanical properties austempered steels. Multistep thermo-cycling (TC) ultrafast heating (UFH) were carried out compared with outcome obtained from a conventionally annealed (CA) 0.3C-2Mn-1.5Si steel. After path, steel samples fast cooled isothermally treated at 400 °C employing same parameters...

Abstract Nano-bainitic steels have attracted great attention for good wear resistance. In this research, a medium-carbon low-alloyed steel was austempered at low temperature close to its martensite-start various times obtain mixed microstructure of nano-bainite, martensite and retained austenite. The samples were characterised comprehensively by field-emission SEM quantitative XRD. Its two-body...

A medium-carbon Si–Mn–Ni–Cr–Mo alloyed (300M) steel was austempered for various short periods at its martensite-starting temperature of 285 °C to seek improved sliding wear resistance as compared the traditional martensitic and bainitic steels. Reciprocating tests were performed against a WC/Co ball counterpart constant load 49 N. The samples characterised using field emission SEM, XRD hardness...