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针对Fe-C合金包晶反应过程中,γ相沿L/δ界面侧向生长速度的实测值远远大于Bosze和Trivedi模型的计算值的问题,分析了包晶反应过程中固/液界面前沿溶质浓度分布状况,得到了金属熔体中圆柱形固相生长时固/液界面前沿溶质浓度分布表达式.以Jackson提出的熔体中粗糙界面生长速度公式为基础,确定了适合计算合金包晶反应产物侧向生长速度的公式,并将其应用于Fe-C和Fe-Ni合金的包晶反应过程,计算结果表明,Fe-C和Fe-Ni合金的包晶反应产物γ相的侧向生长速度计算值与Shibata等和Mcdonald等在激光共聚焦扫描显微镜下观察Fe-C和Fe-Ni合金包晶反应时所测得的γ相沿L/δ界面侧向生长速度的实验值基本吻合.
In the process of peritectic reaction of Fe-C alloy, the lateral growth rate of γ phase along the L / δ interface is much larger than that of Bosze and Trivedi models. The influence of solute Concentration distribution, the expression of solute concentration distribution at the front of solid / liquid interface during the solid phase growth of the metal melt was obtained.According to Jackson’s formula of the growth rate of the rough interface in the melt, The results show that the peritectic reaction products of Fe-C and Fe-Ni alloys grow sideways in the γ-phase The calculated velocity values agree well with experimental data such as Shibata et al. And McDonald et al. Observing the lateral growth rate of the γ phase along the L / δ interface at the confocal laser scanning microscopy of the Fe-C and Fe-Ni alloys.