工业纯钛TA1的双道次热压缩变形及软化行为

doi:10.13251/j.issn.0254-6051.2022.04.012

金属热处理 ›› 2022, Vol. 47 ›› Issue (4): 75-79.DOI: 10.13251/j.issn.0254-6051.2022.04.012

工业纯钛TA1的双道次热压缩变形及软化行为

王庆娟¹, 田云飞^1,2, 高贝特¹, 史佳敏¹, 吴欢², 蔡军¹

1.西安建筑科技大学冶金工程学院, 陕西西安 710055;
2.西北有色金属研究院, 陕西西安 710016

收稿日期:2021-12-24 修回日期:2022-01-20 出版日期:2022-04-25 发布日期:2022-05-19
通讯作者: 田云飞,硕士研究生,E-mail:1064541855@qq.com
作者简介:王庆娟(1973—),女,博士,主要研究方向为高强β钛合金、高性能铜合金,E-mail:jiandawqj@163.com。
基金资助:
国家重点研发计划(2017YFB0306200);西安市科技计划(2020KJRC0051)

Two-pass hot compression deformation and softening behavior of commercially pure titanium TA1

Wang Qingjuan¹, Tian Yunfei^1,2, Gao Beite¹, Shi Jiamin¹, Wu Huan², Cai Jun¹

1. School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an Shaanxi 710055, China;
2. Northwest Institute for Non-Ferrous Metal Research, Xi'an Shaanxi 710016, China

Received:2021-12-24 Revised:2022-01-20 Online:2022-04-25 Published:2022-05-19

摘要/Abstract

摘要： 在Gleeble-3500热模拟试验机上对工业纯钛TA1进行单、双道次等温热压缩试验,变形温度为650~850 ℃,道次间隙时间为1~60 s,变形速率为10 s^-1,研究了工业纯钛TA1单、双道次热压缩过程中静态软化和动态软化行为。利用光学显微镜对变形后的微观组织进行观察,研究了工业纯钛TA1在不同变形条件下的微观组织演变。结果表明,工业纯钛TA1在单、双道次热压缩变形过程中表现出明显的硬化和软化行为,峰值应力前表现为加工硬化,峰值应力后表现为加工软化,最终达到动态软化和加工硬化的动态平衡。在道次间隙时间内发生静态软化,静态软化程度随着道次间隙时间的增加和温度的升高而增大。随着道次间隙时间的延长和温度的升高,道次间再结晶更加充分,第二道次变形后晶粒尺寸增加更明显,当发生完全再结晶时,软化程度达到最大。在热压缩变形期间,发生动态软化,650 ℃和750 ℃时以动态再结晶为主,850 ℃时以动态回复为主。

关键词: 工业纯钛TA1, 双道次热压缩, 软化率, 静态软化, 动态软化

Abstract: Commercially pure titanium TA1 was subjected to one-pass and two-pass hot compression experiments on Gleeble-3500 thermal simulator with deformation temperature of 650-850 ℃, the pass interval time of 1-60 s, and the deformation rate of 10 s^-1. The static and dynamic softening behaviors of the commercially pure titanium TA1 during the one-pass and two-pass hot compression were studied. The microstructure evolution of the commercially pure titanium TA1 under different deformation conditions was studied by optical microscope. The results show that the hardening and softening behaviors of the commercially pure titanium TA1 is obvious during both the one-pass and the two-pass hot compression deformation. Before the peak stress, it is work hardening, and after the peak stress, it is work softening. Finally, the dynamic softening and work hardening reach the dynamic equilibrium. The static softening occurs in the interval time. The static softening rate increases with the increase of interval time as well as the temperature. The recrystallization between passes becomes more sufficient, and the grains grow up obviously after the second pass deformation with the increase of interval time and temperature. When complete recrystallization occurs, the softening rate reaches the maximum. During the hot compression deformation, dynamic softening occurs. Dynamic recrystallization is dominated at 650 ℃ and 750 ℃ and dynamic recovery at 850 ℃.

Key words: commercially pure titanium TA1, double-stage hot compression, softening rate, static softening, dynamic softening

中图分类号:

TG146.2

王庆娟, 田云飞, 高贝特, 史佳敏, 吴欢, 蔡军. 工业纯钛TA1的双道次热压缩变形及软化行为[J]. 金属热处理, 2022, 47(4): 75-79.

Wang Qingjuan, Tian Yunfei, Gao Beite, Shi Jiamin, Wu Huan, Cai Jun. Two-pass hot compression deformation and softening behavior of commercially pure titanium TA1[J]. Heat Treatment of Metals, 2022, 47(4): 75-79.

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工业纯钛TA1的双道次热压缩变形及软化行为

Two-pass hot compression deformation and softening behavior of commercially pure titanium TA1

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