氮化硅陶瓷球冷等静压过程有限元模拟及试验验证  

Finite Element Simulation and Experimental Verification of Cold Isostatic Pressing Process for Silicon Nitride Ceramic Balls

作　　者：李海洋 高向向 马越[1,2,3] 刘丽斌 张永乾 LI Haiyang;GAO Xiangxiang;MA Yue;LIU Libin;ZHANG Yongqian(Luoyang Bearing Research Institute Co., Ltd.,Luoyang 471039,China;Henan Key Laboratory of High Performance Bearing Technology, Luoyang 471039,China;China International Science and Technology Cooperation Base for Digitization Design of High Performance Bearing, Luoyang 471039,China;Luoyang Non-Ferrous Metal Design and Research Institute, Luoyang 471039,China)

机构地区：[1]洛阳轴承研究所有限公司,河南洛阳471039 [2]河南省高性能轴承技术重点实验室,河南洛阳471039 [3]高性能轴承数字化设计国家国际科技合作基地,河南洛阳471039 [4]洛阳有色金属加工设计研究院,河南洛阳471039

出　　处：《轴承》2020年第8期48-51,55,共5页Bearing

摘　　要：利用Abaqus软件对氮化硅陶瓷球的冷等静压(CIP)成形过程进行了数值模拟,分析了氮化硅陶瓷球在CIP成形过程中致密度的变化和粉末颗粒的流动规律,研究了其应力分布,并进行了试验验证,结果表明:在CIP成形过程中,致密化曲线可分为4个阶段,相对密度的分布存在环形密度差现象,试验证明该工艺可以改善氮化硅陶瓷球压坯密度和组织结构分布的均匀性。The cold isostatic pressing(CIP)forming process for silicon nitride ceramic balls is simulated numerically by using Abaqus software,the change of density and flow law of powder particles of silicon nitride ceramic balls during CIP forming process are analyzed.The stress distribution is studied,and the experimental verification is carried out.The results show that during CIP forming process,the densification curve is divided into four stages,the distribution of relative density has phenomenon of ring density difference.The experiment proves that the technology improves green density and distribution uniformity of microstructure of silicon nitride ceramic balls.

关 键 词：滚动轴承 球 氮化硅陶瓷 冷等静压 有限元仿真 致密度 

分 类 号：TH133.331[机械工程—机械制造及自动化] O313.7[理学—一般力学与力学基础]