15Cr12CuSiMoMn钢的奥氏体晶粒长大动力学

doi:10.13251/j.issn.0254-6051.2022.02.010

金属热处理 ›› 2022, Vol. 47 ›› Issue (2): 53-58.DOI: 10.13251/j.issn.0254-6051.2022.02.010

15Cr12CuSiMoMn钢的奥氏体晶粒长大动力学

杨劼, 任慧平, 刘宗昌

内蒙古科技大学材料与冶金学院, 内蒙古包头 014010

收稿日期:2021-10-09 修回日期:2021-12-09 出版日期:2022-02-25 发布日期:2022-04-01
作者简介:杨劼(1989—),男,博士研究生,主要研究方向为贝氏体高强钢,E-mail:442617634@qq.com

Kinetics of austenite grain growth of 15Cr12CuSiMoMn steel

Yang Jie, Ren Huiping, Liu Zongchang

School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou Inner Mongolia 014010, China

Received:2021-10-09 Revised:2021-12-09 Online:2022-02-25 Published:2022-04-01

摘要/Abstract

摘要： 利用箱式炉将15Cr12CuSiMoMn钢加热至900～1100 ℃奥氏体化温度区间分别保温15～120 min,研究了不同奥氏体化温度和保温时间下原奥氏体晶粒的长大行为。结果表明,随着奥氏体化温度的升高,晶粒尺寸不断增大,长大行为呈幂函数规律;在1000 ℃以上加热,晶粒显著粗化;随着保温时间的延长,晶粒长大行为呈近似于抛物线匀减速规律;保温时间<60 min时,晶粒长大速率较快,当保温时间超过60 min时趋于平稳。基于Arrhenius公式,通过对试验数据进行线性回归拟合分析,建立了适合于本钢种的晶粒长大动力学模型,对比模型计算值与实际测量数据间的误差(2%＜ΔXi＜5%)验证了该模型的准确性与可靠性。

关键词: 15Cr12CuSiMoMn钢, 奥氏体晶粒长大行为, 动力学模型, 晶粒尺寸

Abstract: 15Cr12CuSiMoMn steel was heated to the austenitizing temperature range between 900-1100 ℃ in a box-typed furnace for 15-120 min respectively. The growth behavior of prior austenite grains under different austenitizing temperatures and soaking time was studied. The experimental results show that with the increase of austenitizing temperature, the grain size increases continuously, and the growth behavior shows a law of power function. Heated above 1000 ℃, grain coarsens obviously. With the prolongation of time, the grain growth behavior is similar to the parabolic uniform deceleration law. When the soaking time is less than 60 min, the grain growth rate is faster, and tends to be stable when the soaking time is more than 60 min. Based on Arrhenius formula, a dynamic model of grain growth is established through the linear regression analysis of experimental data. The error(2%＜ΔXi＜5%) between model calculation and actual measured data is compared and the accuracy and reliability of the model are verified.

Key words: 15Cr12CuSiMoMn steel, austenite grain growth behavior, dynamic model, grain size

中图分类号:

TG142.1

杨劼, 任慧平, 刘宗昌. 15Cr12CuSiMoMn钢的奥氏体晶粒长大动力学[J]. 金属热处理, 2022, 47(2): 53-58.

Yang Jie, Ren Huiping, Liu Zongchang. Kinetics of austenite grain growth of 15Cr12CuSiMoMn steel[J]. Heat Treatment of Metals, 2022, 47(2): 53-58.

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15Cr12CuSiMoMn钢的奥氏体晶粒长大动力学

Kinetics of austenite grain growth of 15Cr12CuSiMoMn steel

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