李伟,陈文琳,吴跃,杨栋,周香

• 1:合肥工业大学材料科学与工程学院

摘要(Abstract)：

对42CrMo钢在不同加热温度(850~1150℃)和保温时间(0~1200 s)下的奥氏体晶粒长大规律进行了研究。采用金相定量法对加热后材料的奥氏体晶粒度进行测量,建立42CrMo钢加热时奥氏体晶粒长大演化模型。结果表明:奥氏体晶粒尺寸随加热温度升高呈指数关系长大,随保温时间的延长呈近似抛物线形式长大;利用基于唯象理论的Sellars模型,通过非线性回归方法建立42CrMo钢加热时奥氏体晶粒长大演化模型;将该模型导入有限元软件中预报42Cr Mo钢加热时奥氏体晶粒变化,预报结果与实验结果吻合,验证了该模型的正确性。

关键词(KeyWords)： 42CrMo钢;奥氏体晶粒;晶粒长大;晶粒尺寸预报

Abstract:

Keywords:

基金项目(Foundation): 教育部科学技术研究重大项目(311025)

作者(Author): 李伟,陈文琳,吴跃,杨栋,周香

DOI: 10.13289/j.issn.1009-6264.2015.01.021

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