刘玉,李玥

• 1:上海工程技术大学材料科学与工程学院
• 2:河北工业大学材料科学与工程学院
• 3:中钢集团邢台机械轧辊有限公司轧辊复合材料国家重点实验室

摘要(Abstract)：

换热系数的精确计算对提高淬火过程数值模拟精度具有十分重要的意义。为此，本文编写了换热系数计算程序，以42CrMo钢为例，对该程序进行了校核，并据此研究了测温位置对换热系数计算结果的影响，分别计算了空冷及水冷过程的换热系数并通过测量不同直径试样的冷却曲线进行了验证。结果表明：测点位置越接近表面，换热系数计算值精度越高；对于空冷过程，当温度高于487 K时，辐射换热大于对流换热，当温度低于487 K时以对流换热为主；水冷的换热系数与工件表面温度有关，在表面温度为473 K左右时数值达到最大；在本研究的直径范围内(30～280 mm),根据某一直径试样计算得到的换热系数适用于其他直径的工件。

关键词(KeyWords)： 淬火;换热系数;有限元;相变

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51801125);; 上海工程技术大学大学生创新训练项目(cx2205012)

作者(Author): 刘玉,李玥

DOI: 10.13289/j.issn.1009-6264.2023-0174

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