张芳,黄华贵,杜凤山,王敏婷,赵玲玲

• 1:燕山大学机械工程学院

摘要(Abstract)：

建立连续冷却过程多相转变模型,并实现了对冷却过程中各相转变量的数值预测。用传统叠加模型和Cahn微分模型分别对40Cr钢连续冷却过程中组织分布进行了模拟计算,结果表明,考虑动力学参数n随温度变化的相变动力学微分方程计算结果与实际结果更为接近。为分析晶粒尺寸对相变过程的影响,结合不同奥氏体化温度下的等温膨胀实验,讨论了考虑晶粒尺寸时的相变动力学模型的应用范围,不同晶粒度下的相变参数n相同时,模型才能准确反应实际相变过程。

关键词(KeyWords)： 非等温相变;叠加法;晶粒尺寸;相变动力学

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重点项目(No.50435010,50534020);; 国家科技支撑计划资助项目(2007BAF02B12)

作者(Author): 张芳,黄华贵,杜凤山,王敏婷,赵玲玲

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