高钼无磁钢等温变形过程中的析出及温度场模拟

doi:10.13251/j.issn.0254-6051.2023.06.028

金属热处理 ›› 2023, Vol. 48 ›› Issue (6): 156-161.DOI: 10.13251/j.issn.0254-6051.2023.06.028

高钼无磁钢等温变形过程中的析出及温度场模拟

姜一鸣^1,2, 屈华鹏², 郎宇平², 冯翰秋², 陈海涛², 李向明¹

1.昆明理工大学材料科学与工程学院, 云南昆明 650093;
2.钢铁研究总院有限公司特殊钢研究院, 北京 100081

收稿日期:2022-12-08 修回日期:2023-04-08 发布日期:2023-08-11
通讯作者: 李向明,教授,博士,E-mail:Lixm@kmust.edu.cn
作者简介:姜一鸣(1997—),男,硕士研究生,主要研究方向为不锈钢及耐蚀合金材料,E-mail:1076010282@qq.com。

Precipitation and temperature field simulation of high molybdenum non-magnetic steel during isothermal deformation

Jiang Yiming^1,2, Qu Huapeng², Lang Yuping², Feng Hanqiu², Chen Haitao², Li Xiangming¹

1. School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming Yunnan 650093, China;
2. Institute for Special Steel, General Iron and Steel Research Institute Company Limited, Beijing 100081, China

Received:2022-12-08 Revised:2023-04-08 Published:2023-08-11

摘要/Abstract

摘要： 通过DEFORM有限元模拟软件对高钼无磁钢进行等温变形水冷过程中的温度场模拟, 并对试验钢进行不同保温试验, 得出析出相析出的敏感温度区间, 并对等温变形工艺中析出相的种类进行了研究。结果表明, 析出相的敏感温度区间为700~900 ℃;等温变形工艺的锻棒在水冷过程中表面迅速降温, 心部降温较慢, 心部与表层温度有较大差距, 根据模拟结果最大温差为300 ℃, 认为在水冷过程中心部存在靠近析出相敏感温度区间的高温区, 析出风险极大提高。等温变形过程对析出相的形核与长大有促进作用, 根据XRD标定确定等温变形态与时效态试样中的析出相均为Cr₂₃C₆。

关键词: 无磁钢, 温度场, 析出相, 等温变形

Abstract: Temperature field of water cooling process in the isothermal deformation process of a high molybdenum non-magnetic steel was simulated by the DEFORM finite element simulation software, and the sensitive precipitation temperature range of the precipitated phases was obtained with the thermal insulation test of the tested steel, and the types of precipitated phases in the isothermal deformation process were studied. The results show that the sensitive precipitation temperature range is 700-900 ℃. According to the simulation results, the maximum temperature difference of the surface and the center of the specimen is 300 ℃, and it is considered that the center exists a high temperature zone close to the sensitive precipitation temperature range in the water cooling process, resulting that the risk of precipitation is greatly increased. The isothermal deformation process has a promoting effect on the nucleation and growth of the precipitated phases, and the precipitated phase in the isothermal deformed specimen and as-aged specimen is determined to be Cr₂₃C₆ according to the XRD diffraction pattern calibration.

Key words: non-magnetic steel, temperature field, precipitates, isothermal deformation

中图分类号:

TG161

姜一鸣, 屈华鹏, 郎宇平, 冯翰秋, 陈海涛, 李向明. 高钼无磁钢等温变形过程中的析出及温度场模拟[J]. 金属热处理, 2023, 48(6): 156-161.

Jiang Yiming, Qu Huapeng, Lang Yuping, Feng Hanqiu, Chen Haitao, Li Xiangming. Precipitation and temperature field simulation of high molybdenum non-magnetic steel during isothermal deformation[J]. Heat Treatment of Metals, 2023, 48(6): 156-161.

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高钼无磁钢等温变形过程中的析出及温度场模拟

Precipitation and temperature field simulation of high molybdenum non-magnetic steel during isothermal deformation

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