摘要
对旋压成形阴极辊工业纯钛TA1进行不同温度(480~540℃)退火不同时间(15~120 min)的热处理,研究了退火过程中其外表面微观组织演变及再结晶行为。结果表明:旋压变形工业纯钛TA1的晶粒变形严重,应变形式主要表现为轴向和切向拉伸、径向压缩。旋压钛材外表面在480℃退火120 min未完成充分再结晶,在500、520和540℃退火60 min以内可充分再结晶,对应的完成再结晶所需的较短时间分别为60、30和30 min。随着退火温度的升高和退火时间的延长,钛材晶粒尺寸增大,显微硬度下降。电子背散射衍射(EBSD)分析发现,旋压变形工业纯钛TA1在较低温度(480和500℃)退火时的再结晶形核过程主要由亚晶形核机制主导。根据试验数据,计算得到旋压变形工业纯钛TA1的再结晶激活能为88.328 kJ/mol,晶粒长大激活能为62.214 kJ/mol。经退火工艺参数优化,500℃退火60 min时旋压变形工业纯钛外表面的晶粒最为细小均匀,平均尺寸为5.8μm。
The spinning deformed cathode roller commercially pure titanium(CP-Ti)TA1 was annealed at different temperatures(480-540℃)for different time(15-120 min),and the microstructure evolution and recrystallization behavior of its outer surface during annealing were studied.The results show that the grain deformation of the spinning deformed pure titanium TA1 is serious,and the strain forms are mainly axial and tangential tension and radial compression.The outer surface of the spinning titanium is not fully recrystallized after annealing at 480℃ for 120 min,but can be fully recrystallized within 60 min after annealing at 500,520 and 540℃,and the corresponding shorter time required to complete recrystallization is 60,30 and 30 min respectively.With the increase of annealing temperature and annealing time,the grain size of the spinning titanium increases and the microhardness decreases.Electron back-scatter diffraction(EBSD)analysis found that the recrystallization nucleation process of the spinning deformed commercially pure titanium TA1 annealed at lower temperatures(480 and 500℃)is mainly dominated by the subgrain nucleation mechanism.According to the experimental data,the activation energy of recrystallization and grain growth of the spinning deformed commercially pure titanium TA1 is 88.328 kJ/mol and 62.214 kJ/mol,respectively.After optimization of annealing process parameters,when annealing at 500℃ for 60 min,the grain of the outer surface of the spinning deformed commercially pure titanium is the most fine and uniform,with an average size of 5.8μm.
作者
曹晓
贾淑果
朱倩倩
宋克兴
刘海涛
柳亚辉
冯庆
贾波
沈楚
CAO Xiao;JIA Shu-guo;ZHU Qian-qian;SONG Ke-xing;LIU Hai-tao;LIU Ya-hui;FENG Qing;JIA Bo;SHEN Chu(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Provincial and Ministerial Co-construction Collaborative Innovation Center of Nonferrous New Materials and Advanced Processing Technology,Luoyang 471023,China;Henan Province Key Laboratory of Nonferrous Materials Science and Processing Technology,Luoyang 471023,China;Henan Academy of Sciences,Zhengzhou 450046,China;School of Mechatronics Engineering,Henan University of Science and Technology,Luoyang 471023,China;Xi’an Taijin Industrial Electrochemical Technology Co Ltd,Xi’an 710005,China)
出处
《材料热处理学报》
CAS
CSCD
北大核心
2023年第8期67-75,共9页
Transactions of Materials and Heat Treatment
基金
国家重点研发计划(2021YFB3400800)。
关键词
工业纯钛TA1
旋压
再结晶
组织演变
亚晶形核
commercially pure titanium TA1
spinning
recrystallization
microstructure evolution
subgrain nucleation
作者简介
曹晓(1997-),女,硕士研究生,主要从事电解铜箔用阴极钛材微观组织调控研究,E-mail:caoxiao@stu.haust.edu.cn;通信作者:贾淑果(1972-),女,教授,博士,主要从事高性能铜合金的开发与应用研究,E-mail:sgjia@haust.edu.cn。
