ZL205A合金舱体低压工艺设计及数值仿真应用  

Low Pressure Process Design and Numerical Simulation Application in ZL205A Alloy Shell Casting

作　　者：孙浩 崔恩强 张娜[1] 刘颖卓[1] 陈俊杰 朱辉[1] 卜华锋 王财华 SUN Hao;CUI Enqiang;ZHANG Na;LIU Yingzhuo;CHEN Junjie;ZHU Hui;BU Huafeng;WANG Caihua(Shanghai Spaceflight Precision Machinery Institute,Shanghai 201600,China)

机构地区：[1]上海航天精密机械研究所,上海201600

出　　处：《上海航天》2019年第2期131-135,共5页Aerospace Shanghai

摘　　要：针对某ZL205A合金舱体铸件壁薄难充型、壁厚差异大、易产生裂纹等特点,设计了低压底注式浇注工艺。采用立筒缝隙式浇注系统分配充型过程中合金的流量,局部厚大部位放置成形冷铁加快该部位的冷却速度,以控制铸造缺陷的产生。利用ProCast数值仿真软件对工艺进行仿真计算,成功预测了缺陷的产生位置,对工艺方案进行优化,包括倒角过渡、改变型砂使用等,并在优化方案的基础上浇注了舱体铸件,铸件质量良好,没有缩松、缩孔、裂纹等缺陷,符合相关技术要求。ZL205A alloy is used in the shell casting which has the thin wall and huge difference in wall thickness and is easily cracked.The low pressure bottom gating casting process is designed so as to make alloy liquid easier to fill the mold while forming chillers are placed at the thick area aiming to control casting defects.The positions where casting defects occur are predicted successfully with ProCast numerical simulation software.The process is optimized by various means.Based on the optimized process,the produced shell casting is of good quality and free from defects such as shrinkage porosity,shrinkage cavities and cracks,meeting relevant technical requirements.

关 键 词：舱体铸件 低压浇注 铸造缺陷 数值仿真 工艺优化 

分 类 号：TG245[金属学及工艺—铸造]