Finite Element Simulation of Influence of Different Compacting Processes on Powder

Metallurgic Products Properties

WANG Deguang¹  WU Yucheng¹ JIAO Minghua²  YU Jianwei²²  XIE Ting²

(1. School of Material and Engineering, Hefei University of Technology, Hefei 230009;
2. Institute of Tribology, Hefei University of Technology, Hefei 230009)

Abstract: The metal powder compaction process is simulated with the finite element analysis software MSC/MARC. The simulation applies thermal mechanically coupled analysis based on the updated Lagrangian method to study the influencing rules of different compacting processes (temperature, friction, compacting style, etc). The mechanical characters (compacting force, ejecting force, stress distribution, etc) of the compaction process are also analyzed. The results indicate that friction condition is the crucial factor which influences the value and distribution of green density, double compaction can improve the distribution and values of green density which is made uneven and large deviation by means of single compaction. Increasing temperature is propitious to improve the plastic deformable capacity of powder particles, but the effect is not evident. Otherwise, the compaction temperature influences the properties of lubricant which influences the condition of friction so that the temperature should be considered when the compaction process is made. Increasing temperature and decreasing friction are propitious to decrease compaction pressure, improve the distribution of density, and also improve the phenomenon of stress concentration.

Key words: Powder  Density  Finite element method  Compaction

CLC No: TG376

安徽省“十五”二期科技攻关(040020392)、合肥市重点科技(20051044)和安徽省自然科学基金(070414180)资助项目. Received 20070313, received in revised form 20070925