宋静雯,谭长生,孙巧艳,肖林,赵永庆,孙军.等温淬火对TC21钛合金微观组织和力学性能的影响[J].稀有金属材料与工程,2019,48(4):1260~1266.[Jingwen Song,Changsheng Tan,Qiaoyan Sun,Lin Xiao,Yongqing Zhao,Jun Sun.Effect of the step-quenching on microstructures and mechanical properties of TC21 titanium alloy[J].Rare Metal Materials and Engineering,2019,48(4):1260~1266.]
等温淬火对TC21钛合金微观组织和力学性能的影响
投稿时间:2017-09-09  修订日期:2017-11-24
中文关键词:  次生α相  等温淬火  微观组织  力学性能
基金项目:国家科学自然基金(51671158, 51471136, 51471129, 51621063),973计划课题(2014CB644003)和引智计划(B06025)
中文摘要:
      本文研究了TC21钛合金在两相区固溶后直接在较低温度保温一定时间水冷到室温(等温淬火)获得的组织与力学性能。将试样在900℃ 固溶0.5h,分别在600℃-60℃ 温度范围等温保温1h后水冷到室温,观察微观组织特征,测试宏观和显微硬度以及拉伸性能。结果表明:从600℃到400℃,次生α相宽度逐渐减小;从400℃ 到60℃,次生α相宽度几乎保持不变。宏观维氏硬度与β转变基体的微观维氏硬度变化规律相同。随着等温淬火温度提高,延伸率和断面收缩率缓慢增加。TC21钛合金的硬度、强度随着次生α相宽度的减小而升高。300或400℃ 等温淬火所得组织的强度与塑性的匹配性最好。
Effect of the step-quenching on microstructures and mechanical properties of TC21 titanium alloy
英文关键词:Secondary α lath  Step-quenching  Microstructures  Mechanical properties
英文摘要:
      In this paper, the microstructures which were obtained through step-quenching and the mechanical properties of TC21titanium alloy were investigated systematically. The samples were solution treated at 900℃ for 0.5h, and then 9 sets of step-quenching experiments with temperature from 600℃ to 60℃ were carried out. The microstructure characteristics, hardness and tensile mechanical properties was measured and compared with different microstructures. The results show that the width of secondary α lath gradually decreased from 600℃ to 400℃, and nearly remained constant from 400℃ to 60℃. The variation of the macro-Vickers hardness is the same as that of βtrans matrix. The elongation and the reduction of area slowly increases with increasing the quenching temperature. The Vickers hardness, yield strength and tensile strength increase with decreasing the width of secondary α lath. The microstructure with a good combination of strength and ductility was obtained through the step-quenching at 300 to 400℃.
作者单位E-mail
宋静雯 西安交通大学 cstan323@stu.xjtu.edu.cn 
谭长生 西安交通大学 tcs1215@126.com 
孙巧艳 西安交通大学 qysun@mail.xjtu.edu.cn 
肖林 西安交通大学  
赵永庆 西北有色金属研究院  
孙军 西安交通大学  
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