研究了退火加热速度和退火冷却速度对IF钢显微组织、第二相粒子析出和力学性能的影响。研究结果表明,随加热速度增加,铁素体晶粒变小、第二相粒子变小、强度增加;随冷却速度增加,晶粒尺寸变小、第二相粒子变小并伴随着局部偏聚现象。 The effects of annealing heating rate and annealing cooling rate on the microstructure and second phase particle precipitation and mechanical properties of IF steel were studied. The results show that as the heating rate increases, the ferrite grains become smaller, the second phase particles become smaller and the strength increases; as the cooling rate increases, the grain size becomes smaller and the second phase particles become smaller and accompanied by the partial segregation phenomenon.