贺连芳,李辉平,盖康,张春芝,李木森

• 1:山东科技大学材料科学与工程学院
• 2:山东大学材料科学与工程学院

摘要(Abstract)：

为了利用数值模拟技术计算感应加热过程中丝杠的奥氏体化情况,利用Gleeble1500D热模拟试验机,测试了55CrMo钢试样在升温速率为0.05~-50 K/s时的膨胀曲线,得到了它的奥氏体化温度与加热速率的关系。根据相变膨胀曲线,利用杠杆定律得到了奥氏体转变量与温度的关系,并对非等温相变Johnson-Mehl-Avrami(JMA)方程中的动力学参数进行了线性回归分析,得到了JMA相变动力学模型。利用数值模拟技术,计算了丝杠在感应加热时的奥氏体化情况和淬火后的硬度曲线,并与实验结果进行对比。结果表明,模拟结果与实验结果吻合得较好,所得到的JMA方程能较好地描述55CrMo钢的奥氏体化过程。

关键词(KeyWords)： 相变动力学;JMA方程;数值模拟;感应淬火

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51175302,51575324);; 国家科技重大专项(2011ZX04014-031);; 教育部“新世纪优秀人才支持计划”(NCET-12-0342)

作者(Author): 贺连芳,李辉平,盖康,张春芝,李木森

DOI: 10.13289/j.issn.1009-6264.2015.10.041

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