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在低碳马氏体不钢的临界间温过程中逆转奥氏体演变的数值模拟

Dingpeng Huo¹, Jielong Peng², Xiangjun Chen³

¹State Key Laboratory of Featured Metal Materials and Life Cycle Safety for Composite Structures, MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China.

Materials (Basel, Switzerland)

|April 13, 2024

概括

在13Cr4Ni马氏体不钢中反向奥氏体形成受炼温度和时间的影响. 碳化物和元素分离影响其热稳定性,模型预测其含量.

科学领域:

材料科学材料科学材料科学
金工业是金工业的一个方面.
物理化学物理化学

背景情况:

在炼过程中反转的奥氏体形成显著影响了13Cr4Ni马氏体不钢的机械性能.
了解反转奥氏体的含量和形态对于优化热处理过程至关重要.

研究的目的:

为了研究钢化温度和保持时间对逆转奥氏体积分数的影响.
分析碳化物沉和元素分离在反向奥氏体形成中的作用.
开发一个用于逆转奥氏体含量的预测模型.

主要方法:

在现场X射线衍射 (XRD) 来测量反转的奥氏体积分数.
传输电子显微镜 (TEM) 用于评估反向奥氏体和碳化物.
JMAK和KM模型用于反向奥氏体形成的动力模拟.

主要成果:

奥氏体含量与炼温度有着抛物线关系,在610°C左右达到6.8%的峰值.
奥斯酸盐含量也显示出持久时间的抛物线趋势,在5小时内达到9.2%的最高值.
碳化物沉和元素分离被确定为影响反转奥氏体热稳定的关键因素.

结论:

化温度和保持时间是控制反转奥氏体形成的关键参数.
碳化物沉和元素分离在反向奥氏体的稳定性中起着重要作用.
一个结合的数学模型可以准确地预测室温逆转的奥氏体含量.

关键词:

00Cr13Ni4Mo 钢的使用情况在 JMAK 方程中,反向的奥氏体是一种反向的奥氏体.热稳定性的热稳定性

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