干硬切削表面白层厚度的建模与预测

发布时间：2018-05-24 16:25

本文选题：干硬切削 + 白层　；参考：《机械工程学报》2015年17期

【摘要】：干硬切削加工过程中产生的表面白层对零件的使用性能和使用寿命有很大影响,对白层厚度进行准确的定量预测具有重要的理论意义与应用价值。基于材料的化学热力学基本理论,对切削过程中合金元素、应力、应变等因素耦合影响下的奥氏体相变温度进行了理论推导,根据计算出的相变温度和有限元的模拟结果,建立了基于相变形成相理的白层厚度预测模型。GCr15淬硬钢试验结果与预测结果对比分析表明,本模型适用于热力耦合占主导地位的切削过程,该模型能够在考虑了热-力耦合因素的情况下更为准确地预测出干硬切削表面相变白层的厚度。
[Abstract]:Based on the basic theory of chemical thermodynamics of materials , the austenite phase transition temperature under the influence of factors such as alloy elements , stress , strain and other factors in cutting process is theoretically deduced . Based on the calculated phase transition temperature and the simulation results of finite element , a white layer thickness prediction model based on phase change is established . The results of the experiment and prediction results show that the model is suitable for the cutting process dominated by thermal coupling . The model can predict the thickness of the phase change white layer of the dry hard cutting surface more accurately under the condition of considering the thermal - force coupling factor .
【作者单位】：大连理工大学机械工程学院;上海航天设备制造总厂;
【基金】：国家自然科学基金资助项目(51375072)
【分类号】：TG506

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