冷轧压下率对Nb+Ti-IF钢织构及成形性的影响  

Effect of cold rolling reduction on texture and forming property of Nb+Ti-IF steel

作　　者：朱帅[1] 康永林[1] 王川[1] 焦景民[2] 牛世浦 张乃林[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]唐山国丰钢铁有限公司技术部,河北唐山063300

出　　处：《材料热处理学报》2011年第3期107-110,共4页Transactions of Materials and Heat Treatment

摘　　要：以工业生产的不同冷轧压下率Nb+Ti-IF钢退火板为原料,通过微观组织观察,力学性能和XRD宏观织构测试,从冷轧过程中晶粒转动差异上来分析冷轧压下率对Nb+Ti-IF钢织构和成形性能的影响。试验结果表明:在相同的热轧和退火工艺条件下,高的冷轧压下率促使在冷轧过程中形成较多的{111}〈110〉冷轧织构,在退火过程中会形成较强的{111}〈211〉织构,{111}〈211〉织构的增加可以大幅度提升45°方向的r值,从而在改善各向异性的基础上使平均r值提高0.4～0.5,同时使n值从0.22增加到0.28。Commercial annealed Nb＋Ti-IF steel sheets with different cold rolling reductions were employed to study effect of cold rolling reduction on texture and forming property of the IF steel by means of microstructure observation,mechanical property tests and XRD texture analysis.The results show that under the same hot-roll and anneal conditions,more {111}〈110〉cold-rolled texture forms at high cold rolling reduction,then the stronger {111} 〈211〉fiber texture appears during annealing process,which improves anisotropy of the steel by increasing r-value in 45° direction significanfly,and elevates the average r-value by 0.4-0.5,and meanwhile n-value increases from 0.22 to 0.28.

关 键 词：无间隙原子钢 冷轧压下率 织构 r值 

分 类 号：TG142.1[一般工业技术—材料科学与工程]