STRUCTURE AND PROPERTIES OF LOW-CARBON ACICULAR FERRITE STEEL

Thermomechanical control processing has already been accepted as the m ost cost effective route of producing superior quality, value-added hi gh strength low alloy steels. Among all the strengthening mechanism, g rain refinement has the maximum potential for increasing strength as w ell as improving low temperature toughness properties. Modern hot stri p mills are so designed that this type of processing can easily be per formed in the finishing stands by using facilities like laminar spray cooling in the run-out-table. Micro alloying always makes the steel mo re expensive. In the present study, efforts were made to develop low c arbon steels with judicious trimming of microalloying in an experiment al rolling mill simulating the controlled rolling and cooling conditio ns of the new 1 mtpa semi continuous state-of-the-art Hot Strip Mill a t Tata Steel.