基于复合铸型的钛合金双流道闭式叶轮铸造工艺研究  

Product of Titanium Alloy Double channel Enclosed Impeller Based on Compound Mold

作　　者：肖强伟 贾志伟 范世玺 纪志军 王德季 Xiao Qiangwei;Jia Zhiwei;Fan Shixi;Ji Zhijun;Wang Deji(Beijing Institute of Aeronautical Materials Co.,Ltd.;AECC Beijing Institute of Aeronautical Materials;Beijing Engineering Research Center of Advanced Titanium Alloy Precision Forming Technology)

机构地区：[1]北京航空材料研究院股份有限公司,北京100094 [2]中国航发北京航空材料研究院 [3]北京市先进钛合金精密成型工程技术研究中心

出　　处：《特种铸造及有色合金》2023年第9期1275-1278,共4页Special Casting & Nonferrous Alloys

摘　　要：针对具有狭小间隙特点的钛合金双流道闭式叶轮铸造过程中存在的技术难点,提出了一种复合铸型铸造工艺。复合铸型的外模采用石墨铸型,型芯为特种砂芯,该砂芯成本低、生产周期短和溃散性好。复合铸型预热后在真空自耗凝壳炉中熔炼浇注,对铸件浇注结果进行了分析。结果表明,闭式叶轮清芯便捷,铸件成形完整,表面粗糙度在6.3μm以下,铸件尺寸轮廓误差在±0.5 mm。采用石墨-砂芯复合铸型铸造工艺可实现对具有狭小间隙特点的钛合金铸件的研制。In view of technical difficulties existing in the development of titanium alloy double-channel enclosed impeller casting with narrow clearance,a casting process of compound mold was proposed with graphite shell and special casting sand core,which has advantages of low cost,short production cycle and high collapsibility.After preheating,melting and pouring were conducted in vacuum consumable shell furnace.The results indicate that closed impeller core cleaning is convenient and the casting shape is complete,where the surface roughness is controlled below 6.3μm and profile size error within±0.5 mm.Therefore,development of titanium alloy castings with narrow clearance can be realized by graphite-sand core compound casting process.

关 键 词：钛合金铸件 双流道闭式叶轮 狭小间隙 复合铸型 

分 类 号：TG249.5[机械工程—精密仪器及机械] TG146.23[金属学及工艺—铸造]