冷轧压下率对CSP流程SPCC钢板退火组织和织构的影响

The Influence of Cold Rolled Reduction Ratio on Annealing Texture and Microstructure of SPCC in CSP Process

采用某钢厂生产的低碳铝镇静钢进行了CSP流程SPCC钢板不同冷轧压下率的工业试验，研究了退火过程中冷轧压下率对冷轧钢板组织性能的影响规律。结果表明：对于碳含量为0．043％的低碳铝镇静钢，试验条件下冷轧压下率对其力学性能和n影响不明显，对r影响则非常显著；冷轧压下率为75％时，可获得最大rm，综合力学性能也达到最佳；△r则随冷轧压下率的提高而单调减小；铁素体晶粒饼形度随冷轧压下率的提高而增加；冷轧压下率为75％时，{111}织构的强度明显高于冷轧压下率为60％时的对应值。

In use of the Al-killed steel produced by a specified steel plant, the industrial test of producing SPCC in CSP process with different cold rolled reduction ratio is implemented. The influence of cold rolled reduction ratio on microstructure and texture of steel strip in CSP process during annealing is studied. The results show that, for the Al-killed steel with 0. 043 % carbon, the cold rolled reduction ratio does not have obvious influence on the mechanical properties and nvalue, but great influence on r-value. The maximum rmvalue is achieved at the reduction ratio of 75%. And Ar-value is monotonously reduced as the increase of cold rolled reduction ratio. As the reduction ratio is at 75%, the strength of {111} texture is higher than that at 60% reduction ratio.