中厚板淬火热弹性马氏体相变潜热模型

采用扩展体积法预测中低碳中厚板淬火过程马氏体转变量，进而基于修正热弹性变温马氏体相变动力学，引入阻滞函数描述相界面阻力的热滞，建立马氏体转变动力函数并描述其与“理想”自由能函数和阻滞函数的关系.在此基础上，引入阻滞焓来表征阻滞界面所具有的焓，通过计算可逆弹性能和不可逆功，利用吉布斯函数变化计算相变潜热，建立相变潜热模型.用该模型进行的计算机模拟结果和实验结果吻合良好，表明这种理论处理方法可用来模拟中低碳中厚板淬火过程马氏体相变.

Medium Plate Quenching Latent Heat Model Based on Thermoelastic Martensitic Phase Transformation Kinetics

The martensite transform amounts during the quenching process of the medium and low carbon steel plates were predicted using extend volume method. Based on modified thermoelastic altering temperature martensite transformation kinetics， blockage function was introduced to describe the phase interfacial resistance of thermal hysteresis and martensitic transformation dynamic function was established to describe the relationship to its ideal free energy and blockage functions. On this basis， blockage enthalpy which defined in blockage function was introduced to characterize the enthalpy existed on blockage interface. Through the calculation of reversible elastic energy and irreversible work， the latent heat of the phase transformation was finally obtained according to the change of the Gibbs function and the model of the latent heat of phase transformation was established. The simulated results according to the model were in good agreement with the experimental results， which indicated that this model was suitable to use to simulate martensitic transformation during quenching process of medium and low carbon steel plates of moderate thickness.