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以工业生产的高强Nb-IF钢为试验材料,在实验室研究了卷取温度和冷轧压下率对试验钢显微组织和力学性能的影响。结果表明:试验钢退火后均为完全再结晶组织;不同卷取温度下,随着冷轧压下率的增加,晶粒变得细小均匀;当卷取温度为650℃且冷轧压下率为75%时,以及卷取温度600℃和700℃且冷轧压下率65%时,试验钢的织构强度逐渐增大,并且峰值有向{111}织构靠拢的趋势,可以得到优良的深冲性能。
The industrial production of high-strength Nb-IF steel as the test material, the coiling temperature and cold rolling reduction rate on the microstructure and mechanical properties of the test steel. The results show that all of the tested steels are completely recrystallized after annealing. At different coiling temperatures, the grains become fine and uniform with the reduction of the cold rolling reduction. When the coiling temperature is 650 ℃ and the cold rolling reduction rate Is 75%, and the coiling temperature is 600 ° C and 700 ° C and the cold rolling reduction is 65%, the texture strength of the test steel gradually increases and the peak tends to move closer to the {111} texture, resulting in excellent Deep drawing performance.