水溶蜡型芯的脱除工艺研究  

Removal Process of Water-soluble Wax Core

作　　者：张贺 刘永娜 王春钢 ZHANG He;LIU Yongna;WANG Chungang(AECC Shenyang Liming Aero-Engine Co.,Ltd.,Shenyang 110043)

机构地区：[1]中国航发沈阳黎明航空发动机有限责任公司,沈阳110043

出　　处：《特种铸造及有色合金》2025年第2期317-320,共4页Special Casting & Nonferrous Alloys

摘　　要：针对复杂空心结构铸件水溶蜡型芯脱除难度较大和脱除反应物难回收处理的问题,采用稀盐酸和柠檬酸溶液进行脱除试验对比研究,优选了柠檬酸溶液,测试了不同质量分数柠檬酸溶液可脱除水溶蜡的品质,比较了反应速度和型芯的溶解脱除程度,最终确定了采用质量分数为3.4%的柠檬酸溶液进行水溶蜡脱除的工艺方案。设计了一套带有脱芯和清洗功能的脱除设备,实现了型芯脱除的清洁性和反应生成物的物理固液分离,并对固体和液体生成物分别采用了环保处理方案。Aming at the difficulties in removing water-soluble wax cores from castings with complex hollow structure and recycle of removed reactants,the removal of water-soluble wax using dilute hydrochloric acid and citric acid solu⁃tions was comparatively investigated.The citric acid solution was optimized,and weight of water-soluble wax that can be removed by different concentrations of citric acid solution was tested.The reaction rate and dissolution as well as removal degree of the core were analyzed comparatively.Finally,a process plan for removing water-soluble wax using a 3.4%(mass fraction)citric acid solution was determined.A set of removal process equipment with core removal and cleaning functions was designed,achieving the cleanliness of core removal and physical solid-liquid separation of reac⁃tion products,and environmentally-friendly treatment schemes were adopted for solid and liquid products.

关 键 词：水溶蜡型芯 柠檬酸溶液 精密铸造 

分 类 号：TG249.5[机械工程—精密仪器及机械]