摘要
综合热传导方程与过冷形核、生长规律,用显式有限差分法模拟了共晶铸铁的凝固过程。给出了理论冷却曲线、冷却曲线、固相率及单位时间内潜热释放速度之间的关系及实验结果。讨论了铸件壁厚对显微组织及奥氏体/碳化物共晶转变趋势的影响。
An explicit finite—difference method (FDM) was used to model and simulate the solidification of eutectic cast iron by combining heat transfer equations with undercooling nucleation and growth laws. Theoretical cooling curves,the relationship between cooling curve, fraction of solid and liberation of latent heat per unit time,and experimental results are presented.The thickness of castings on their microstructure and the tendency for austenite/carbide eutectic reaction are also discussed
关键词
共晶铸铁
铸铁
凝固过程
微观模拟
explicit finite-difference method
modeling and simulation of solidification
eutectic cast iron
nucleation
growth
heat transfer
