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。
The calculation of temperature field has a great influence upon the analysis of the thermal stresses and strains 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 42 CrMo steel, the CCT diagram was simulated by mathematical transformation, and the volume fraction of phase constituents was calculated. The thermal physical properties were treated as the functions of temperature and the volume fraction of phase constitutents. Finally, the temperature field with phase transformation and non-linear surface heat-transfer coefficients was calculated with finite element method, and the corresponding functional of temperature was established.
出处
《应用数学和力学》
SCIE
EI
CSCD
北大核心
1998年第1期15-20,共6页
Applied Mathematics and Mechanics
基金
云南省学术和技术带头人培养经费和应用基础研究基金
关键词
有限元法
淬火
相变
温度场
非线性表面系数
finite element method
quenching
heat conduction
phase transformation
