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建立了扩散过程控制下的奥氏体连续冷却转变模型,用于描述先共析铁素体界面位置随温度的变化规律.模型考虑了界面移动过程中可能出现的软碰撞情况以及冷速对界面奥氏体侧C浓度的影响.运用该模型对不同初始C浓度、奥氏体晶粒尺寸和冷速下的奥氏体连续冷却转变过程进行模拟,得到不同冷却条件下的先共析铁素体界面位置、界面奥氏体侧的C扩散长度以及C浓度分布随温度的变化规律.对晶粒尺寸为17μm的Fe-0.17C合金进行不同冷速下的转变过程模拟,所得结果与文献吻合较好.
The continuous austenite transformation model under diffusion control is established to describe the variation of the proeutectoid ferrite interface with temperature.The model considers the possible soft collision and the effect of cooling rate on the interface Austenite side of the C concentration of the use of the model for different initial C concentration, austenite grain size and cooling rate of austenite continuous cooling transformation process to obtain under different cooling conditions of pro-eutectoid ferrite The change of the C diffusion length and the C concentration distribution with the temperature on the austenite side of the interface.The simulation of the transition process of the Fe-0.17C alloy with the grain size of 17μm under different cooling rates was carried out, and the results were in good agreement with the literature better.