S34MnV钢的奥氏体晶粒长大动力学

doi:10.13251/j.issn.0254-6051.2021.06.031

金属热处理 ›› 2021, Vol. 46 ›› Issue (6): 153-159.DOI: 10.13251/j.issn.0254-6051.2021.06.031

S34MnV钢的奥氏体晶粒长大动力学

阎勇, 卜恒勇, 李萌蘖, 郑善举

昆明理工大学材料科学与工程学院, 云南昆明 650093

收稿日期:2021-01-20 出版日期:2021-06-25 发布日期:2021-07-21
通讯作者: 李萌蘖,教授,博导,E-mail:limengnie@163.com
作者简介:阎勇(1994—),男,硕士研究生,主要研究方向为材料加工集成计算材料工程,E-mail:1455809365@qq.com。
基金资助:
科技部材料基因工程关键技术与支撑平台重点研发计划(2017YFB0701804);昆明理工大学分析测试基金(2019M20182230100)

Kinetics of austenite grain growth of S34MnV steel

Yan Yong, Bu Hengyong, Li Mengnie, Zheng Shanju

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

Received:2021-01-20 Online:2021-06-25 Published:2021-07-21

摘要/Abstract

摘要： 利用DIL-805AD/T动态膨胀相变仪对S34MnV钢在不同加热温度和保温时间下进行奥氏体化试验,通过晶界腐蚀、光学显微镜观察和截点法测定了奥氏体平均晶粒尺寸,并对S34MnV钢奥氏体晶粒长大规律进行了深入分析。通过对比Beck模型、Hillert模型和Sellars模型,根据实测晶粒尺寸数据拟合并优化了模型参数,建立了S34MnV钢奥氏体晶粒长大的动力学模型。结果表明:兼顾加热温度和保温时间两方面影响因素的Sellars模型的计算结果与实测数据吻合较好,可用于预测S34MnV钢在880~920 ℃加热温度范围内,保温10~240 min时的奥氏体晶粒长大规律。

关键词: S34MnV钢, 船用曲轴钢, 奥氏体晶粒, 晶粒长大模型

Abstract: Austenitizing experiment of the S34MnV steel was carried out under different heating temperature and holding time by using DIL-805ADT dynamic dilatometer. The average grain sizes of austenite were measured by etching grain boundaries and optical microscope observation. And the austenite grain growth law of the S34MnV steel was intensively studied. Compared with Beck model, Hillert model and Sellers model, the model parameters were fitted and optimized according to the measured grain size data, and the kinetic model of austenite grain growth of the S34MnV steel was established. The results show that the calculated results of Sellars model are in good agreement with the measured data, which can be used to predict the austenite grain growth of the S34MnV steel in a temperature range of 880 ℃ to 920 ℃ when holding for 10 min to 240 min.

Key words: S34MnV steel, marine crankshaft steel, austenitic grain, grain growth model

中图分类号:

TG142.33

阎勇, 卜恒勇, 李萌蘖, 郑善举. S34MnV钢的奥氏体晶粒长大动力学[J]. 金属热处理, 2021, 46(6): 153-159.

Yan Yong, Bu Hengyong, Li Mengnie, Zheng Shanju. Kinetics of austenite grain growth of S34MnV steel[J]. Heat Treatment of Metals, 2021, 46(6): 153-159.

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S34MnV钢的奥氏体晶粒长大动力学

Kinetics of austenite grain growth of S34MnV steel

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