5CrNiMoV钢的奥氏体化动力学预测

doi:10.13251/j.issn.0254-6051.2020.09.042

金属热处理 ›› 2020, Vol. 45 ›› Issue (9): 227-232.DOI: 10.13251/j.issn.0254-6051.2020.09.042

5CrNiMoV钢的奥氏体化动力学预测

彭旭, 卜恒勇, 李萌蘖

昆明理工大学材料科学与工程学院,云南昆明 650093

收稿日期:2020-03-29 出版日期:2020-09-25 发布日期:2020-12-29
通讯作者: 李萌蘖,教授,博士,E-mail:limengnie@kust.edu.cn
作者简介:彭旭(1996—),男,硕士研究生,主要研究方向为材料基因工程,E-mail:1247780292@qq.com
基金资助:
科技部重点研发计划(2017YFB0701804)

Prediction of austenitization kinetics of 5CrNiMoV steel

Peng Xu, Bu Hengyong, Li Mengnie

Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China

Received:2020-03-29 Online:2020-09-25 Published:2020-12-29

摘要/Abstract

摘要： 利用DIL-805ADT动态热膨胀相变仪测定5CrNiMoV热作模具钢在不同加热速率下的膨胀量并对膨胀曲线数据进行分析,运用Kissinger方法拟合出了非等温扩散相变动力学Johnson-Mehl-Avrami(J-M-A)模型中的奥氏体化相变激活能Q、相变参数n和lnk₀,建立5CrNiMoV钢奥氏体化动力学模型。该模型计算所得的奥氏体转变量与试验测量结果相吻合,可用于预测等温奥氏体化动力学曲线和设计5CrNiMoV钢的奥氏体化工艺过程。

关键词: 5CrNiMoV钢, 奥氏体化, 相变动力学, J-M-A相变模型

Abstract: Dilations of 5CrNiMoV steel at different heating rates were measured by utilizing DIL-805ADT dynamic dilatometer,and dilationcruve was analyzed.Kinetic parameters in the Johnson-Mehl-Avrami (J-M-A) model for non-isothermal diffusion phase transitions were fitted from the dilation data using the Kissinger method.Such kinetic parameter as the activation energy Q,exponent n and lnk₀ are determined to establish kinetic model for austenization.Calculated amounts of transformed austenite are in good agreement with the experimentally observed.The model can be used to predict isothermal austenization and to design austenitization process of the 5CrNiMoV steel in engineering practice.

Key words: 5CrNiMoV steel, austenitization, transformation kinetics, J-M-A transformation model

中图分类号:

TG142.33

彭旭, 卜恒勇, 李萌蘖. 5CrNiMoV钢的奥氏体化动力学预测[J]. 金属热处理, 2020, 45(9): 227-232.

Peng Xu, Bu Hengyong, Li Mengnie. Prediction of austenitization kinetics of 5CrNiMoV steel[J]. Heat Treatment of Metals, 2020, 45(9): 227-232.

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5CrNiMoV钢的奥氏体化动力学预测

Prediction of austenitization kinetics of 5CrNiMoV steel

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