Zr对Ti-Mo复合微合金化钢形变奥氏体静态再结晶动力学和析出相的影响

doi:10.13251/j.issn.0254-6051.2022.02.008

金属热处理 ›› 2022, Vol. 47 ›› Issue (2): 41-47.DOI: 10.13251/j.issn.0254-6051.2022.02.008

Zr对Ti-Mo复合微合金化钢形变奥氏体静态再结晶动力学和析出相的影响

郝天赐¹, 吴雍壕¹, 阴树标², 曹建春¹, 罗瀚宇¹

1.昆明理工大学材料科学与工程学院, 云南昆明 650093;
2.昆明理工大学冶金与能源工程学院, 云南昆明 650093

收稿日期:2021-09-24 修回日期:2021-12-04 出版日期:2022-02-25 发布日期:2022-04-01
通讯作者: 曹建春,教授,E-mail:nmcjc@163.com
作者简介:郝天赐(1996—),男,硕士研究生,主要研究方向为先进钢铁材料,E-mail:2437245320@qq.com。
基金资助:
国家自然科学基金(51761019)

Effect of Zr on static recrystallization kinetics of deformed austenite and precipitates in Ti-Mo composite microalloyed steel

Hao Tianci¹, Wu Yonghao¹, Yin Shubiao², Cao Jianchun¹, Luo Hanyu¹

1. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming Yunnan 650093, China;
2. Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming Yunnan 650093, China

Received:2021-09-24 Revised:2021-12-04 Online:2022-02-25 Published:2022-04-01

摘要/Abstract

摘要： 通过在Gleeble-3500热模拟试验机上进行双道次压缩模拟试验,研究了Ti-Mo复合微合金化钢和Ti-Zr-Mo复合微合金化钢在875、925、975和1025 ℃四个温度下形变奥氏体的静态再结晶过程。分析了两种试验钢在双道次压缩模拟时的真应力-真应变曲线,建立了两种试验钢的静态再结晶动力学模型,计算了两种试验钢奥氏体静态再结晶激活能,采用高分辨透射电镜观察了不同温度双道次压缩后两种试验钢中形变诱导析出相和大颗粒未溶相的形貌和种类,并对试验钢的形变储能密度进行了简单比较。结果表明,Zr的添加可以提高Ti-Mo复合微合金化钢在变形过程中的变形抗力,使试样在热变形过程中积累的形变储能增多,同时降低形变奥氏体的静态再结晶激活能,使奥氏体的再结晶更容易发生。Zr可以替代Ti与O、S等形成大颗粒未溶相,使试验钢静态再结晶过程中析出更多细小弥散的形变诱导析出相,使试验钢中形变奥氏体的静态再结晶过程出现延迟。

关键词: Ti-Zr-Mo复合微合金化钢, 静态再结晶, 形变诱导析出相

Abstract: Through two-pass compression simulation experiment on the Gleeble-3500 thermal simulation test machine, the static recrystallization process of deformed austenite of Ti-Mo microalloyed steel and Ti-Zr-Mo microalloyed steel at four deformation temperatures of 875, 925, 975 and 1025 ℃ was studied. The true stress-true strain curves of the two kinds of tested steels during two-pass compression simulation were analyzed. The static recrystallization kinetic models of the tested steels were established. The austenite static recrystallization activation energy of the tested steels was calculated. After two-pass compression at different temperatures, the morphologies and types of the deformation-induced precipitated phase and the large-particle undissolved phase in the tested steels were observed by a high-resolution transmission electron microscope. And the deformation energy storage density in the tested steels was simply compared. The results show that the addition of Zr can increase the deformation resistance of Ti-Mo microalloyed steel during deformation, increase the accumulated deformation storage energy during the hot deformation, reduce the static recrystallization activation energy of deformed austenite, and make the recrystallization of austenite easier to occur. Zr can replace Ti to form the undissolved phase with O, S and other elements, so that finer and more dispersed deformation-induced precipitates in the tested steel are precipitated during static recrystallization, and the static recrystallization process of deformed austenite of the tested steel is delayed.

Key words: Ti-Zr-Mo microalloyed steel, static recrystallization, deformation-induced precipitate

中图分类号:

TG142

郝天赐, 吴雍壕, 阴树标, 曹建春, 罗瀚宇. Zr对Ti-Mo复合微合金化钢形变奥氏体静态再结晶动力学和析出相的影响[J]. 金属热处理, 2022, 47(2): 41-47.

Hao Tianci, Wu Yonghao, Yin Shubiao, Cao Jianchun, Luo Hanyu. Effect of Zr on static recrystallization kinetics of deformed austenite and precipitates in Ti-Mo composite microalloyed steel[J]. Heat Treatment of Metals, 2022, 47(2): 41-47.

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Zr对Ti-Mo复合微合金化钢形变奥氏体静态再结晶动力学和析出相的影响

Effect of Zr on static recrystallization kinetics of deformed austenite and precipitates in Ti-Mo composite microalloyed steel

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