测试了一种微合金钢(008%C,164%Mn,0033%Nb,0019%Ti)经1200℃加热,奥氏体分别在未经变形、850℃经50%压缩变形条件下的CCT曲线和瞬时加热到1330℃时的CCT曲线。在二辊实验轧机和控冷设备上模拟热连轧和控冷工艺。结果表明,实验钢经控轧控冷中温卷取可获得针状铁素体组织,抗拉强度达到570MPa,总伸长率大于25%,冷弯成形性能优良。 A micro-alloyed steel (008% C, 164% Mn, 0033% Nb, 0019% Ti) heated at 1200 ℃ was tested for the austenite CCT curve without deformation and under 50% And the instantaneous heating to 1330 ℃ when the CCT curve. In the two roll mill and controlled cooling equipment simulation of hot rolling and controlled cooling process. The results show that acicular ferrite microstructure can be obtained by controlled rolling and controlled cold-temperature cold rolling. The tensile strength reaches 570MPa, the total elongation is more than 25%, and the cold forming performance is excellent.