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.
出处
《过程工程学报》
CAS
CSCD
北大核心
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)
关键词
组织
退火温度
保温时间
深冲性能
织构
microstructure
annealing temperature
holding time
deep drawability
texture
