消失模负压铸造液态金属流动前沿气隙的厚度研究  

Research on Thickness of Gas Interspace When Liquid Metal Flows in Process of Pouring in Expendable Pattern Casting

作　　者：朱丽娟[1] 赵欣[1] 张佳平[1] 朱春熙[2] 张新颖[1] 董秀琦[1] 

机构地区：[1]沈阳理工大学材料学院,辽宁沈阳110168 [2]洛阳工业高等专科学校,河南洛阳471003

出　　处：《铸造技术》2005年第9期798-799,803,共3页Foundry Technology

摘　　要：利用基础理论计算出消失模铸造正常浇注时金属液流动前沿气隙的厚度δ与静压头h、砂箱的真空度P真、模样水平截面积的周长S、涂层的透气性K、直浇道面积S直与其内的液态金属流速v直的积及模型的密度ρ模、涂层的厚度H、液态金属的浇注温度T金的关系,并根据理论分析预言消失模铸造将要走向取消真空、减薄或取消涂层的方向。We figured out the relation between the thickness of gas interspace which is in the front of liquid metal flowage in the process of pouring in Expendable Pattern Casting and static pressure of metal（h）,vacuum degree of sand box （P直）,level perimeter of model（S） ,permeability of coating（K）,the product of area of vertical path （S直）and velocity of flow when liquid metal flows in it ,density of model（ρ模 ） ,thickness of coating（δ） ,pouring temperature（T金）, and predict evaporated pattern casting is making for canceling vacuum and decreasing or canceling coating by theory analysis.

关 键 词：消失模铸造 液态金属 气隙 厚度 

分 类 号：TG249.5[机械工程—精密仪器及机械]