淬火过程中具有非线性表面系数考虑相变时温度场的有限元分析<sup>*</sup>

程赫明; 张曙红; 王洪纲; 李剑云

淬火过程中具有非线性表面系数考虑相变时温度场的有限元分析^*

昆明理工大学, 昆明 650093

基金项目: * 云南省学术和技术带头人培养经费和应用基础研究基金

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出版历程
- 收稿日期: 1996-11-04
- 刊出日期: 1998-01-15

Finite Element Analysis of Temperature Field with Phase Transformation and Non-Linear Surface Heat-Trasfer Coefficeint during Quenching

Kunming University of Science and Technology, Kuming 650093, P. R. China

摘要

摘要: 温度场的计算对淬火过程中热应力和热应变的分析有较大影响,对淬火后试件的残余应力和微观结构分析也有较大影响.本文以42CrMo钢圆柱体试件为研究对象,从相变等温动力学TTT图,给出了连续冷却相变动力学CCT图的数学模拟计算式,计算了钢淬火过程中相变组织成分百分比,将热物性系数处理为温度和相变体积百分比的函数,用有限单元法计算了淬火过程中具有非线性表面系数考虑相变时的温度场.并建立了相应的泛函,为以后计算淬火的热应力和热应变做好准备工作.
- 有限元法 /
- 淬火 /
- 热传导 /
- 相变
Abstract: The calculation of temperature field has a great influence upon the analysis of the thermal stresses and stains during quenching, and also upon the residual stresses and microstructure of the workpiece after quenching, too. In this paper, a 42CrMo steel cylinder was taken as an investigating example. From the TTT diagram of the 42CrMo steel, the CCT diagram was simulated by mat hematical transformation, and the volume fraction of phase constit uents was calculated. The thermal physical properties were treated as the functions of temperature and the volume fraction of phase constit utents. Finally, the temperature field with phase transformation and non-linear surface heattransfer coefficeints was calculated with finite element method, and the corresponding functional of temperature was established.
- finite element method /
- quenching /
- heat conduction /
- phase transformation

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参考文献(8)

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