13Cr超级马氏体不锈钢热压缩变形行为与组织演变

doi:10.13251/j.issn.0254-6051.2021.03.032

金属热处理 ›› 2021, Vol. 46 ›› Issue (3): 159-165.DOI: 10.13251/j.issn.0254-6051.2021.03.032

13Cr超级马氏体不锈钢热压缩变形行为与组织演变

季慧玲¹, 吕金峄², 张义伟², 杨磊², 尹元德³

1.马鞍山学院大阪医工学院, 安徽马鞍山 243000;
2.安徽工业大学材料科学与工程学院, 安徽马鞍山 243002;
3.安徽工业大学冶金工程学院, 安徽马鞍山 243002

收稿日期:2020-11-16 出版日期:2021-03-25 发布日期:2021-05-08
通讯作者: 张义伟,讲师,博士,E-mail:ywzhang14@126.com
作者简介:季慧玲(1986—),女,讲师,硕士,主要研究方向为金属材料的组织与性能,E-mail:568512009@qq.com。
基金资助:
安徽高校自然科学研究重点项目(KJ2016A806)

Hot compression deformation behavior and microstructure evolution of 13Cr super martensitic stainless steel

Ji Huiling¹, Lü Jinyi², Zhang Yiwei², Yang Lei², Yin Yuande³

1. Department of Osaka University Medical Engineering, Maanshan University, Ma'anshan Anhui 243000, China;
2. School of Materials Science and Engineering, Anhui University of Technology, Ma'anshan Anhui 243002, China;
3. School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan Anhui 243002, China

Received:2020-11-16 Online:2021-03-25 Published:2021-05-08

摘要/Abstract

摘要： 通过Gleeble-3500热模拟试验机对13Cr超级马氏体不锈钢进行单道次压缩变形试验,系统研究变形温度在950~1150 ℃、应变速率为0.001~10 s^-1条件下的热变形行为。利用双曲正弦模型建立了13Cr超级马氏体不锈钢的流变应力本构方程,求得试验钢的热变形激活能为412 kJ/mol,并基于动态材料模型(DMM)理论绘制了材料的热加工图,得出材料的最佳热变形工艺参数窗口为:变形温度1032~1072 ℃,应变速率0.039~0.087 s^-1。组织演变结果表明,试验钢在高变形温度和低应变速率的条件下,容易发生动态再结晶。当应变速率一定时(0.01 s^-1),变形温度从950 ℃升到1050 ℃,动态再结晶的体积分数从18.7%升高到60.1%,组织的再结晶程度提高,晶粒均匀细小;当变形温度一定时(1050 ℃),随着应变速率的降低,动态再结晶的晶粒长大粗化。

关键词: 超级马氏体不锈钢, 热压缩变形, 本构方程, 电子背散射衍射(EBSD)

Abstract: The hot deformation behavior of 13Cr super martensitic stainless steel was studied by means of Gleeble-3500 thermal simulation mechanical simulator. The single pass compression experiment was conducted with the temperature range of 950-1150 ℃ and the strain rate range of 0.001-10 s^-1. The constitutive equation of flow stress is established based on hyperbolic sine model, and the hot deformation activation energy of the experimental steel is obtained as about 412 kJ/mol. Based on the dynamic material model (DMM) theory, the processing map of the steel is established, from which the optimal ranges of hot deformation temperature and strain rate are determined as 1032-1072 ℃ and 0.039-0.087 s^-1, respectively. The results of microstructure evolution study show that the experimental steel is prone to produce the dynamic recrystallization under high deformation temperature and low strain rate. When the deformation temperature rises from 950 ℃ to 1050 ℃ under 0.01 s^-1 strain rate, the volume of dynamic recrystallization increases from 18.7% to 60.1%, and the recrystallization grains are fine and uniform. When the deformation temperature is 1050 ℃, the dynamically recrystallized grains grow and coarsen with the decrease of strain rate.

Key words: super martensitic stainless steel, hot compression deformation, constitutive equation, electron back-scatter diffraction (EBSD)

中图分类号:

TG142.71

季慧玲, 吕金峄, 张义伟, 杨磊, 尹元德. 13Cr超级马氏体不锈钢热压缩变形行为与组织演变[J]. 金属热处理, 2021, 46(3): 159-165.

Ji Huiling, Lü Jinyi, Zhang Yiwei, Yang Lei, Yin Yuande. Hot compression deformation behavior and microstructure evolution of 13Cr super martensitic stainless steel[J]. Heat Treatment of Metals, 2021, 46(3): 159-165.

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13Cr超级马氏体不锈钢热压缩变形行为与组织演变

Hot compression deformation behavior and microstructure evolution of 13Cr super martensitic stainless steel

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