球墨铸铁凝固过程微观组织模拟

Microstructure Simulation During Solidification of S.G. Cast Iron

根据热力学和凝固原理等,建立了凝固过程中热传递、溶质传递和石墨球、奥氏体形核、生长的数学物理模型,以能量最小原理为基础,考虑体积自由能和界面能的定量影响,对奥氏体晶粒的形核和生长进行了摸拟。根据所建立的模型,采用了Microsoft Visual C++6.0开发平台开发了相应的三维模似计算程序和二维动态显示程序。

Based on thermodynamics and solidification theory, a mathematical and physical model of heat transfer and solute transfer, nucleation and growth of spheroidal graphite and austenite during solidification was established. With the law of lowest energy as basis and considering quantitative effects of bulk free energy and interfacial energy, the nucleation and growth of austenite grains was simulated. Based on the established model and by using Microsoft Visual C++6.0, a 3-dimensional calculation simulation program and 2 dimensional image displaying program was developed.