浇注温度和铸型刚度对阀体缩松缺陷的影响研究  

Influence of Pouring Temperature and Mold Stiffness on Shrinkage Porosity of Valve Body

作　　者：宋东君 沈旭[2] 赵金跃 郑玉佳 郑恩旭 SONG Dongjun;SHEN Xu;ZHAO Jinyue;ZHENG Yujia;ZHENG Enxu(Jinyu Thermal Processing Tangshan Co.,Ltd.,Tangshan 063000,Hebei China;State Key Laboratory of Materials Processing and Die and Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,Hubei China)

机构地区：[1]金隅热加工唐山有限公司,河北唐山063000 [2]华中科技大学材料成形与模具技术全国重点试验室,湖北武汉430074

出　　处：《铸造工程》2025年第2期58-62,共5页Foundry Engineering

摘　　要：针对大型阀体铸件在砂型铸造过程中存在的缩松缺陷,利用CAE模拟软件研究关键工艺参数浇注温度和铸型刚度对缩松缺陷的影响情况。缩松缺陷主要出现在阀体的厚壁处,在浇注温度为1390℃、铸型刚度为0.83 N·m^(-1)时,缩松数量最少为3个,缩松体积最小为5.18 cm^(3)。从而得知,提高铸型的紧实度,并且采用1390℃的浇注温度,能够有效减少该铸件的缩松缺陷。Aiming at the shrinkage defects of large valve body castings in the sand casting process,CAE simulation software was used to study the influence of key process parameters-pouring temperature and mold stiffness on shrinkage defects.The shrinkage defect mainly appears in the thick wall of the valve body,when the pouring temperature is 1390℃ and the molding stiffness is 0.83 N·m^(-1),the minimum number of shrinkage is 3,and the minimum volume of shrinkage is 5.18 cm^(3).Therefore,it is concluded that improving the compactness of the mold and using a pouring temperature of 1390℃ can effectively reduce the shrinkage defect of the casting.

关 键 词：砂型铸造 数值模拟 浇注温度 铸型刚度 缩松缺陷 

分 类 号：TG245[金属学及工艺—铸造]