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Numerical Simulation of Microstructure Evolution of Heavy Steel Casting in Casting and Heat Treatment Processes

机译：铸造及热处理过程中重型钢铸件组织演变的数值模拟

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The microstructure evolution of hypoeutectoid steel during casting and heat treatment processes was simulated by using cellular automaton method. In the simulation, the peritectic solidification, α phase precipitation and pearlite transformation during casting process were considered, and the austenite formation, grain coarsening and decomposition during heat treatment were simulated. The final microstructure, including the average grain size and fraction of α phase as well as the average interlamellar spacing of pearlite, was obtained. The use of through-process simulation as well as a comparison with experiments was demonstrated using a hollow shaft casting as an example. By using the model, the microstructure evolution at different locations in the hollow shaft was simulated, in which the thermal history data obtained by simulating the casting and heat treatment processes were adopted. Metallographic samples taken from the test bar were examined and corresponding mechanical properties tests were conducted. The simulated results were compared with the experimental results to validate the model.
机译：利用元胞自动机方法模拟了亚共析钢在铸造和热处理过程中的组织演变。在模拟中，考虑了铸造过程中的包晶凝固，α相析出和珠光体相变，并模拟了热处理过程中的奥氏体形成，晶粒粗化和分解。得到了最终的显微组织，包括平均晶粒尺寸和α相分数以及珠光体的平均层间距。以空心轴铸件为例，演示了使用过程模拟以及与实验进行比较。通过使用该模型，模拟了空心轴不同位置的组织演变，其中采用了通过模拟铸造和热处理过程获得的热历史数据。检查了从测试棒中取出的金相样品，并进行了相应的机械性能测试。将模拟结果与实验结果进行比较以验证模型。

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