刘铭阳,陈学文,周正,毛怡然,徐栋栋,李强,易浩,周旭东

• 1:河南科技大学材料科学与工程学院

摘要(Abstract)：

为了准确预测HG-80钢的晶粒长大过程并调控其微观组织,在900～1200℃的保温温度和10～1200s的保温时间条件下,采用Gleeble-1500D型热模拟机对其进行等温保温实验,分析其晶粒长大过程,并基于实验数据建立了Burke-Turnbull晶粒长大动力学模型。通过二次开发将计算所得的Burke-Turnbull模型参数导入DIGIMU~*软件中,从晶粒尺寸分布、晶粒生长动力学和晶粒拓扑结构等方面,基于Level Set方法建立了描述HG-80钢的晶粒长大模型并通过DIGIMU~*软件进行仿真计算。结果表明:随着保温时间的增加,实验钢的晶粒尺寸明显增大,晶粒生长速率逐渐减小,呈抛物线状增长;为了验证Burke-Turnbull模型的准确性,将平均晶粒尺寸的模型预测值与实验值进行对比,相关系数R为0.991,表明该模型的准确性较高;通过Level Set方法仿真计算得出的晶粒形貌与实验结果吻合良好,证明该模型能有效预测不同热处理条件下HG-80钢的晶粒长大过程。

关键词(KeyWords)： HG-80钢;Level Set方法;晶粒长大;Burke-Turnbull模型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51575162);; 国家重点研发计划资助项目(2020YFB2008400)

作者(Author): 刘铭阳,陈学文,周正,毛怡然,徐栋栋,李强,易浩,周旭东

DOI: 10.13289/j.issn.1009-6264.2024-0402

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