罩式退火工艺对Ti-IF钢组织性能的影响  

Effects of Bath Annealing Process on Microstructure Properties of Ti-IF Steel

作　　者：冯运莉[1] 齐文婧[1] 张丹[1] 郭帅[1] 

机构地区：[1]河北联合大学冶金与能源学院,河北省现代冶金技术重点实验室,河北唐山063009

出　　处：《过程工程学报》2013年第1期158-163,共6页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:51074062);河北省杰出青年基金资助项目(编号:E2011209029)

摘　　要：利用光学显微镜、伺服拉伸实验机和X射线衍射仪研究了不同退火温度和保温时间对TiIF钢组织、性能及r值的影响规律,分析了工艺优化后的再结晶织构.结果表明,8h为实验Ti-IF钢从部分饼形晶粒到绝大部分等轴晶粒演变过程中的一个时间界限,冷轧板在710℃下保温8h退火后,再结晶晶粒为均匀的等轴晶粒,r值为2.347,抗拉强度312MPa,延伸率44.7%,{111}面织构密度水平达到13.1.在此工艺条件下,Ti-IF钢得到优良的深冲性能,该实验结果可为Ti-IF钢罩式退火工艺的优化提供理论依据.The effects of annealing temperature and holding time on the microstructure, properties and r-value of Ti-IF steel were studied, and the recrystallized texture of optimized Ti-IF steel was analyzed with optical microscope, servo tensile testing machine and X-ray diffraction. The results show that the time boundary from the partial pancake grains to most equiaxial grains in the evolution process is 8 h, the recrystallized equiaxial grains are uniform, the steel sample has r value at 2.347, tensile strength 312 MPa, extension rate 44.7% and density level of { 111 } texture 13.1 when the cold-rolling plate is annealed at 710℃ and holding 8 h. The Ti-IF steel can obtain good deep drawability in this process. The experimental research provides theoretical guidance for perfection of bath annealing process of Ti-IF steel sheet.

关 键 词：组织 退火温度 保温时间 深冲性能 织构 

分 类 号：TG156.21[金属学及工艺—热处理]