以工业生产的不同厚度规格Nb-Ti复合IF钢为试验材料,研究了冷轧压下率对IF钢力学性能及组织织构的影响。试验结果表明,随着冷轧压下率提高,IF钢退火板平均晶粒尺寸增大,强度降低,伸长率升高,塑性应变比r值增大,屈强比以及加工硬化值则变化不大;提高冷轧压下率,有利于促进γ织构,抑制α织构,优化成型性能,但是过高的冷轧压下率会恶化γ纤维织构的均匀性,增加Δγ值。 The effects of cold rolling reduction on the mechanical properties and microstructure of IF steel were studied with different thickness specifications of industrialized Nb-Ti composite IF steel. The experimental results show that the average grain size of IF steel annealed sheet increases, the strength decreases, the elongation increases, the plastic strain ratio r increases, the yield ratio and the work hardening value change with the increase of cold rolling reduction rate Is not large; to improve the rolling reduction rate is conducive to promoting the γ texture, inhibiting the α texture, and optimizing the formability. However, too high cold rolling reduction will worsen the uniformity of γ fiber texture and increase Δγ value.