开式叶轮倒置式铸造工艺研究  

Research on Upside-Down Type Casting Process of Open Impeller

作　　者：杨文亮 洪海春 苏容超 王志冰 邵春艳 王凯强 刘瑜 YANG Wen-liang;HONG Hai-chun;SU Rong-chao;WANG Zhi-bing;SHAO Chun-yan;WANG Kai-qiang;LIU Yu(Beijing National Innovation Institute of Lightweight Ltd.,Bejing 100083,China)

机构地区：[1]北京机科国创轻量化科学研究院有限公司,北京100083

出　　处：《铸造》2023年第1期72-76,共5页Foundry

基　　金：国家重点研发计划资助(2016YFB1101800)。

摘　　要：对开式叶轮正立式和倒置式两种浇注工艺的工艺可行性进行了模拟验证,并对模拟过程中铸件的充型过程、凝固顺序、缺陷倾向进行了系统的对比分析,验证了倒置式叶轮快速铸造工艺在缺陷预防上的优越性。采用砂型3D打印快速成形工艺对叶轮的砂型模具进行快速成形,浇注后对铸件进行精度扫描分析和解剖分析,结果表明:在铸件精度方面,采用倒置式叶轮快速铸造工艺得到的铸件表面尺寸精度在±0.6 mm以内,可达到CT8级,在缺陷预防方面,采用倒置式叶轮快速铸造工艺得到的铸件内部无明显铸造缺陷,而正立式铸造工艺得到的铸件厚大部位产生明显的缩孔、缩松。Upside type and upside-down type impeller pouring processes were simulated to verify the feasibility of the open impeller casting process, and in the process of simulation, filling process, solidification sequence, defect tendency were compared and analyzed, and the advantages of inverted impeller rapid casting process in defect prevention were verified. The sand mold 3D printing rapid prototyping process was adopted to carry out rapid prototyping of the sand mold of the impeller, and the precision scanning analysis and anatomical analysis of the casting were carried out after pouring. The results showed that in terms of casting accuracy, the surface dimensional accuracy of the castings obtained by the upside-down type impeller rapid casting process was within ±0.6 mm, which reached CT8 level. In terms of defect prevention, there are no obvious casting defects in the castings obtained by the upside-down type impeller rapid casting process, while the thick parts of the castings obtained by the upside type casting process produced obvious shrinkage and porosity.

关 键 词：正立式 倒置式 充型过程 凝固顺序 缺陷倾向 砂型3D打印快速成形工艺 

分 类 号：TG24[金属学及工艺—铸造]