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针对石墨砂型铸渗过程，提出了在碳化物析出条件下石墨砂型铸渗过程的温度场、浓度场、固相分数场统一数学模型；利用有限差分法编制了数值模拟软件，对铸渗件二维不稳定温度场、浓度场、固相分数场进行数值模拟；研究了铸件尺寸、浇注温度、铸型预热温度、石墨砂层厚度等因素对渗层深度、碳浓度分布等的影响；提出了石墨砂型铸渗工艺设计的原则。
Aiming at the infiltration process of graphite sand, a unified mathematical model of temperature field, concentration field and solid fraction field in the process of infiltration of graphite sand was proposed. The numerical simulation software was programmed by finite difference method, Dimensional instability temperature field, concentration field and solid fraction field. The effects of casting size, pouring temperature, preheating temperature of mold and thickness of graphite sand layer on the depth of infiltration layer and distribution of carbon concentration were also discussed. Graphite sand infiltration infiltration process design principles.