采用电子背散射衍射、电镜和连续退火模拟试验机等实验手段,研究了不同热轧终轧温度下含P高强IF钢组织和性能。结果表明:930℃终轧,屈服强度为250MPa,抗拉强度为390MPa,伸长率达到38.2%,塑性应变比r值达到1.65;910℃和950℃终轧、连退后钢板的力学性能与930℃终轧相近,伸长率和r值均较低,分别在30%和1.4左右。 Electron backscatter diffraction, electron microscope and continuous annealing simulator were used to study the microstructure and properties of high strength IF steel containing P at different hot rolling finishing temperature. The results show that the final rolling at 930 ℃ has a yield strength of 250MPa, a tensile strength of 390MPa, an elongation of 38.2% and a plastic strain ratio of 1.65. The mechanical properties of the steel after finish rolling at 910 ℃ and 950 ℃ 930 ℃ finish rolling similar elongation and r values ​​were lower, respectively, at 30% and 1.4 or so.