二次冷轧压下率对DCR带钢力学性能与织构的影响

Effect of Reduction Ratio in Secondary Cold-rolling on Mechanical Properties and Texture of DCR Strip Steel

借助于三维取向分布函数(ODF)及EBSD方法,研究了DCR带钢在不同二次冷轧压下率下的力学性能与微观织构变化。实验结果表明:采用二次冷轧加工的DCR带钢在二次冷轧压下率为20.9%时具有相对较好的延展性能;且当压下率约为20.9%时,基本织构组分达到稳定,此时继续增大压下率的作用主要是细化晶粒;压下率超过24.7%时,增大压下率不利于获得弱的α取向纤维织构(〈110〉//RD)和较强的γ取向纤维织构(〈111〉//ND),这将影响材料的深冲性能。

The mechanical properties and texture of DCR strip under different secondary cold-rolling reduction ratios were studied by means of three-dimensional orientation distribution function（ODF）and EBSD method.The results showed that the DCR strip produced by double-cold-rolling had a relatively better extension property when the secondary cold-rolling reduction ratio was 20.9%,and the basic texture components were getting stable.At this time,the effect of increasing reduction ratio was to refine the grain size and when the reduction ratio was over 24.7%,the increase of reduction ratio couldn′t benefit to the texture components of a weakαfiber texture（〈110〉//RD）and a strongγfiber texture（〈111〉//ND）,which went againsts the deep drawability of the material.