0Cr14Mn21NiN奥氏体不锈钢的析出行为

doi:10.13251/j.issn.0254-6051.2020.01.033

金属热处理 ›› 2020, Vol. 45 ›› Issue (1): 164-169.DOI: 10.13251/j.issn.0254-6051.2020.01.033

0Cr14Mn21NiN奥氏体不锈钢的析出行为

李凯强^1,2, 屈华鹏², 冯翰秋², 郎宇平², 陈海涛², 杨银辉¹

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

收稿日期:2019-06-15 出版日期:2020-01-25 发布日期:2020-04-03
通讯作者: 郎宇平,教授,主要从事不锈钢研究,联系电话:13910028851,E-mail:langyuping@nercast.com
作者简介:李凯强(1992—),男,硕士研究生,主要从事奥氏体不锈钢研究,E-mail:784921465@qq.com。
基金资助:
国家重点研发计划(2016YFB0300202)

Precipitation behavior of 0Cr14Mn21NiN austenitic stainless steel

Li Kaiqiang^1,2, Qu Huapeng², Feng Hanqiu², Lang Yuping², Chen Haitao², Yang Yinhui¹

1. School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming Yunnan 650093, China;
2. Institute of Special Steel, Central Iron and Steel Reserch Institute, Beijing 100081, China

Received:2019-06-15 Online:2020-01-25 Published:2020-04-03

摘要/Abstract

摘要： 采用Thermal-Calc热力学计算软件对0Cr14Mn21NiN奥氏体不锈钢C、Cr含量变化对试验钢碳化物析出热力学特征进行了计算。通过光学显微镜、扫描电镜、透射电镜等分析方法探讨了时效温度、保温时间、变形对试验钢析出行为的影响。结果表明:析出相主要是在晶界处产生的Cr₂₃C₆,试验钢析出敏感温度为750~850 ℃。在800 ℃下时效30 min的试验钢晶界处可以明显观察到析出相的产生,随保温时间的延长,析出相含量逐渐增多,尺寸变大,并逐渐向晶内生长。时效前的变形明显缩短了析出相的孕育时间,变形后保温1 min的试验钢晶界处可观察到较多析出相的产生,晶界明显变粗。

关键词: 0Cr14Mn21NiN奥氏体不锈钢, 时效, 变形, 析出行为, Cr₂₃C₆相

Abstract: Thermo-mechanical calculation software of Thermal-Calc was used to calculate the thermodynamic characteristics of carbide precipitation in 0Cr14Mn21NiN austenitic stainless steel. The effects of aging temperature, holding time and deformation on the precipitation behavior of the experimental steel were investigated by means of metallographic microscope, scanning electron microscopy and transmission electron microscopy. The results show that the precipitation phase is mainly Cr ₂₃ C ₆ produced at the grain boundary, and the sensitive temperature for precipitation of the experimental steel is about 750-850 ℃. The precipitation phase can be obviously observed at the grain boundary of the experimental steel aged at 800 ℃ for 30 min. With the prolongation of the holding time, the content of the precipitated phase increases gradually, the size becomes larger, and gradually grows into the grain. The deformation before aging significantly shortens the incubation time of the precipitated phase, and more precipitated phases can be observed at the grain boundary of the experimental steel when kept for 1 min after deformation, and the grain boundary becomes coarsened.

Key words: 0Cr14Mn21NiN austenitic stainless steel, aging, deformation, precipitation behavior, Cr₂₃C₆ phase

中图分类号:

TG156.2

李凯强, 屈华鹏, 冯翰秋, 郎宇平, 陈海涛, 杨银辉. 0Cr14Mn21NiN奥氏体不锈钢的析出行为[J]. 金属热处理, 2020, 45(1): 164-169.

Li Kaiqiang, Qu Huapeng, Feng Hanqiu, Lang Yuping, Chen Haitao, Yang Yinhui. Precipitation behavior of 0Cr14Mn21NiN austenitic stainless steel[J]. HTM, 2020, 45(1): 164-169.

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0Cr14Mn21NiN奥氏体不锈钢的析出行为

Precipitation behavior of 0Cr14Mn21NiN austenitic stainless steel

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