42CrMo钢曲轴电磁感应加热过程奥氏体化  

Austenite formulation of 42Cr Mo steel induction heating crankshaft

作　　者：李继山[1] 廖日东[1] 陈国华[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《材料热处理学报》2015年第1期217-222,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51275044)

摘　　要：根据高精度差分膨胀仪测量的42Cr Mo钢不同加热速度下奥氏体化膨胀量,获得了奥氏体化过程相关的动力学信息,并利用基于JMAK方程的扩展解析动力学方法拟合了考虑加热速度影响的42Cr Mo钢奥氏体化过程动力学模型。拟合结果与实验结果吻合很好;等速加热时,奥氏体化时间与加热速度满足双对数线性关系。利用扩展动力学解析模型和叠加原理,预测了某曲轴42Cr Mo钢加热速度连续变化的电磁感应加热过程中的奥氏体化过程,为后续淬火过程预测提供了组织准备,为加热速度连续变化的加热过程奥氏体化提供了一种预测方法。Austenite formulation of 42 Cr Mo steel heated by different heating rates was investigated by DIL 805 A / D high-resolution differential dilatometer. The kinetics model considering the effect of heating rates was fitted using the extended analytic kinetic model based on JMAK. Results show that fitted results of austenite reaction using the kinetics model meet well with the experimental data.Moreover,the austenitizing time and the heating rate follow the dual logarithmic linear model. Further,austenite formulation of the induction heating crankshaft 42 Cr Mo steel with continuous changed heating rates was predicted using the kinetics model and the additivity rule,which can be the foundation of subsequent quench cooling process. The method is helpful to predict the austenite formulation of the heating process with continuous changed heating rates.

关 键 词：42CRMO钢 奥氏体化 动力学 曲轴 电磁感应加热 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG156.33[金属学及工艺—金属材料]