球墨铸铁后桥壳的铸造缺陷分析和工艺优化  

Casting Defects Analysis and Technology Optimization of Rear Axle Shell of Nodular Cast Iron

作　　者：孙玉[1] 罗键[1] 米国发[2] 叶延洪[1] 林鑫[3] 刘克威[1] 

机构地区：[1]重庆大学机械工程学院,重庆400044 [2]河南理工大学材料学院,河南焦作454000 [3]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《热加工工艺》2008年第17期41-44,共4页Hot Working Technology

基　　金：教育部博士点基金资助项目(20070611030);湖北省自然科学基金青年杰出人才项目(2006ABB027)

摘　　要：针对球墨铸铁后桥壳铸造过程中容易产生缩孔、缩松、热裂等典型缺陷,采用计算机辅助设计软件Pro/E,建立三维实体模型。使用有限元数值软件Z-CAST对铸件充型和凝固过程进行定性模拟再现,分析了铸造过程产生缺陷的主要原因,指导优化了浇注系统的设计,制定了新工艺。应用表明,新工艺降低了铸件缺陷率,达到提高了产品质量的目的。Aimed at shrinkage, porosity and hot tearing and other typical defects during the casting process of rear axle shell of nodular cast iron, the computer-aided design software Pro/E was adopted, its three-dimensional solid model was built. Using finite element software Z-CAST, the casting filling and solidification process was simulated qualitatively, the main reason of defects was analyzed in the process of casting, the new optimum gating system was designed. The results show that the new process reduces casting defect ratio and reaches the purpose of improving product quality.

关 键 词：浇注系统 数值模拟 充型 凝固 

分 类 号：TG245[金属学及工艺—铸造]