基于非线性有限元技术的淬火温度、组织和应力耦合分析

提出了淬火过程温度、组织和应力／应变之间耦合关系的处理方法，开发了淬火工艺有限元模拟软件。建立了适当的有限元模型，模拟了P20钢端部淬火、无内热二维瞬态热传导问题和1080钢棒淬火工艺。利用SVM和Newman定理得到无内热二维瞬态热传导问题的解析结果，对有限元计算的温度场进行了检验；借助于金相和X射线衍射技术，得到组织场、硬度场和应力场的实验数值，利用实验结果对P20钢端部淬火的组织场及力学性能场、1080钢棒淬火工艺的应力场进行了验证。检验结果表明，有限元分析程序得到的模拟结果与理论值或实验结果相吻合。

Coupling Simulation of Temperature, Phase-transformation and Stress in Quenching Process Based on Non-linear Finite Element Method

A method for solving the coupling relationship between temperature, stress and phase-transformation in quenching process was presented, and the FEM software for quenching process was developed. End-quenching of P20 steel, 2-D transient heat transfer problem without latent heat and quenching process of 1080 steel were simulated using this software by established several suitable FEM models. The numerical analysis values of temperature and the experimental results of phase-transformation volumes, hardness distribution and stress were contrasted with FEM simulation results. The contrast between the experimental results and the simulation ones shows that the simulation results of FEM software are consistent with the experimental ones or the numerical analysis values.