K4169合金叶轮真空自耗电极凝壳炉离心铸造工艺研究  

Study on the Centrifugal Casting Process of K4169 Alloy Impeller Vacuum Consumption Electrode Condenser Furnace

作　　者：薛松海 龚燚 史昆 于波 王彦鹏 严建强 李重阳 陈晓明 包宪宇 XUE Song-hai;GONG Yi;SHI Kun;YU Bo;WANG Yan-peng;YAN Jian-qiang;LI Chong-yang;CHEN Xiao-ming;BAO Xian-yu(Shenyang Research Institute of Foundry Co.,Ltd.,State Key Laboratory of Light Alloy Casting Technology for High-End Equipment,Shenyang 110022,Liaoning,China;Aerospace Power Research Institute,Bejing 100076,China;Haixi(Fujian)Institute,China Academy of Machinery Science&Technology.Co.,Ltd.,Sanming 365050,Fujian,China;Representative Office of the Rocket Force Equipment Department in Shenyang District Army,Shenyang 110022,Liaoning,China)

机构地区：[1]沈阳铸造研究所有限公司,高端装备轻合金铸造技术国家重点实验室,辽宁沈阳110022 [2]机械科学研究总院海西(福建)分院有限公司,福建三明365050 [3]北京航天动力研究所,北京100044 [4]火箭军装备部驻沈阳地区军代表室,辽宁沈阳110022

出　　处：《铸造》2022年第4期458-458,459-461,共4页Foundry

基　　金：辽宁省科学技术计划(2019JH1/10100004);辽宁省“兴辽英才计划”(XLYC1808030);辽宁省科学技术计划项目(2018304027);“高档数控机床与基础制造装备”科技重大专项子课题项目(2018ZX04044001)。

摘　　要：高温合金铸件在航空航天等领域有着广泛和重要的应用,常用工艺为感应熔炼浇注。该浇注工艺使用氧化物坩埚,会对原材料纯净度产生影响,且采用重力浇注,合金内部易产生疏松、浇不足等缺陷。为提高合金液纯净度,通过使用真空自耗电极凝壳炉对K4169叶轮进行离心浇注,针对不同浇注系统及离心转速进行了铸造模拟。结果表明,铸造缺陷主要集中于铸件轴向中间位置与叶轮小口径外环处;随着离心转速的提高,铸件内缺陷的数量及分布显著降低,当离心转速为200 r/min时,微观缩孔体积约0.2 cm^(3);经质量检测,铸件表面、内部、化学成分和力学性能均达到相应要求。High-temperature alloy castings have extensive and important applications in aerospace and other fields,and the common process adoptes induction melting and pouring.The pouring process uses oxide crucibles,which will affect the purity of raw materials,and gravity pouring is used to easily produce defects such as porosity and misrun in the alloy.In order to improve the purity of the liquid metal,this paper used a vacuum consumable electrode condenser furnace to perform centrifugal casting of the K4169 impeller,and conducted casting simulations for different pouring systems and centrifugal speeds.The results showed that the casting defects were mainly concentrated in the axial middle position of the casting and the small diameter outer ring of the impeller;with the increase of the centrifugal speed,the number and distribution of the defects in the casting are significantly reduced.When the centrifugal speed was 200 r/min,the microscopic shrinkage pore volume was about 0.2 cm^(3),after quality inspection,the surface,interior,chemical composition and mechanical properties of the casting all met the corresponding requirements.

关 键 词：K4169 真空自耗电极凝壳炉 离心浇注 铸造模拟 

分 类 号：TG249.4[金属学及工艺—铸造]