(哈尔滨工业大学材料科学与工程学院，哈尔滨 150001)
摘 要: 对聚苯乙烯模样性能对金属液充填消失模过程的影响进行了数值模拟，结果表明： 模样性能显著影响金属液充型过程的温度场及充型能力，随模样密度或气化潜热增加， 金属液充型过程中温度降增加， 充型能力下降， 采用低气化潜热、低密度、低发气性聚苯乙烯模样有利于提高金属液的充型能力。最后确定了国产聚苯乙烯珠粒研制开发方向。
关键字: 聚苯乙烯 消失模 数值模拟
（School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China）
Abstract:The influence of the properties of polystyrene pattern on the molten metal filling process in lost foam process was numerically simulated. The simulated results show that the properties of the pattern affected the temperature distribution and the fluid flowability remarkably, the temperature drop of the fluid increases and the fluid flowability decreases as the density or the latent heat of vaporization of the polystyrene pattern increased; it is benificial to increasing the fluid flowability and obtain a sound casting by using the polystyrene pattern with smaller latent heat of vaporization, smaller density and lower gas forming property. At last the developing direction of domestic polystyrene beads was suggested.
Key words: polystyrene lost foam process numerical simulation
