用Materials Science and Engineering A的语气描述下边这段话Two different initial microstructures retaining Mn segregation banding in medium-Mn steel are designed and prepared for the comparative study under IQP pr

The article discusses the design and preparation of two different initial microstructures in medium-Mn steel, which retain Mn segregation banding. The steel has a precise composition of Fe-0.25C-3.08MN-1.5Si-0.054 Nb, wt%. In order to compare the two microstructures under IQP process, ingots of 25 kg laboratory smelted steel were reheated to roughly 1200 °C for 1 h and hot rolled to 4.5 mm. Rectangular specimens were then machined from the cold rolled sheets of 1.5 mm parallel to the rolling direction. Heat treatment experiments were performed on the continuous annealing simulator, and different intercrtical annealing temperatures and quenching temperatures were designed for each sample. The article also discusses another initial microstructure after cold rolling, which was also processed by the same treatment.