退火时间对高强细晶IF钢再结晶织构的影响

Influence of annealing time on recrystallization texture of high-strength IF steel with super-fine grains

以含铌高强细晶IF钢为研究对象,在不同保温时间下进行了连续退火实验。通过采用OM显微分析及EBSD测试技术对实验钢进行显微组织和微观织构观察分析,得到含铌高强细晶IF钢在退火过程中织构的演变规律。实验结果揭示:高强细晶IF钢在连续退火过程中形成较强的<111>//ND再结晶织构。当退火温度为850℃,保温时间为120 s时,钢板具有最强的<111>//ND织构;随着保温时间的增加,<111>//ND织构逐渐增强,<110>//RD先减弱后增强。再结晶织构在{111}面与{112}面之间转化并发生漫散现象。

The continuous annealing experiments are carried out under different annealing time for the super- fine grains high-strength IF steel. The evolution of recrystallization texture is obtained by OM and EBSD. The result reveals that a strong 〈111〉//ND recrystallization texture forms in the IF steel during the continuous an- nealing process. The steel contains the strongest 〈111〉//ND recrystallization texture when the annealing tem- perature is 850℃ and annealing time is 120s. The 〈111〉//ND texture develops while the 〈110〉//RD texture de- creases firstly and then increases. The recrystallization texture transforms between { 111 } and { 112} texture and occurs a diffuse phenomenon with prolonging the annealing time.