Development and Application of Low Cost Plain Carbon Steel (TMCP-F)

The new generation TMCP technology relies onMicrostructure control after-rolling ultra-fast coolingUltra-fast cooling (UFC) to realize flexible control of cooling path. When the final cooling temperature is in ferrite and pearlite transformation zone, it is called TMCP-F process. The grain refinement in this process includes two levels. The first level is refinement of prior austenite grains. Specifically, the steel is firstly subjected to controlled rollingControlled rolling in the high-temperature austenite region, including the complete recrystallization zone and the non-recrystallization zone, so as to obtain the smallest possible hardened austenite grains, which are then rapidly cooled to the low-temperature phase transformation zone to avoid static recrystallization, growth or softening of austenite grains during the cooling process.