高强Ti-IF钢铁素体区热轧和冷轧过程织构演变规律  

Texture evolution in a high-strength Ti-IF steel during ferritic hot rolling and cold rolling

作　　者：王昭东[1] 郭艳辉[1] 王国栋[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,沈阳110004

出　　处：《材料科学与工艺》2009年第1期75-79,共5页Materials Science and Technology

基　　金：国家自然科学基金资助项目(50104004)

摘　　要：为了揭示铁素体区热轧、冷轧和退火过程中高强Ti-IF钢中织构的演变过程,采用X射线衍射仪研究了铁素体区热轧及随后的冷轧和退火织构的特点.研究表明,在铁素体区热轧后,表面和中心面的织构类型和强度不尽相同,表面上的主要织构组分是剪切织构{110}<001>,而中心面上的主要织构组分是{001}<110>～{223}<110>和{111}<110>,由于织构的遗传性,冷轧和退火后的织构在表面和中心面上也不相同;经不同压下率冷轧后,织构变化趋势一致,表面上{110}<001>组分消失,{001}<110>成为最强组分,而中心面上最强组分由{001}<110>沿α取向线向{112}<110>偏移,冷轧织构由α织构和γ织构组成;退火后,表面上织构的变化与以往结论有所不同,{001}<110>～{112}<110>组分减弱,而γ取向线上的{111}<123>组分增强,{111}<112>和{111}<110>减弱.In order to illuminate the evolution of texture in a high-strength Ti - IF steel during the processes of ferritic hot rolling, cold rolling and annealing, the texture characteristics in these processes were studied by X- ray diffractometer. It is found that texture characteristic at the surface is absolutely different from that at the mid-section in ferritic rolling as well as in cold rolling and annealing. Shear texture {110} 〈001 〉 dominates at the surface; {110} 〈001 〉 and {001 } 〈 110 〉 - {223 } 〈 110 〉 are the main components at the mid-section after hot rolling. Texture characteristic at the surface is also different from that at the mid-section in cold rolling and annealing, due to the heredity. Texture changes according to the same way at different cold rolling reductions. { 110} 〈001 〉 at the surface disappears and the intensity of {001} 〈 110 〉 becomes the highest, while the strongest component rotates to {112} 〈 110 〉 at the mid-section after cold rolling. Texture change at the surface shows some differences from conventional results during annealing. The intensity of {001 } 〈 110 〉 - { 112} 〈 110 〉 components is reduced; { 111 } 〈 123 〉 is intensified; but { 111 } 〈112〉 and {111} t 〈 110 〉 are weakened after annealing.

关 键 词：铁素体区热轧 冷轧 退火 织构 高强Ti-IF钢 

分 类 号：TG302[金属学及工艺—金属压力加工]