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Title of article :
Numerical modeling of powder metallurgy processes
Author/Authors :
R Baccino، نويسنده , , F Moret، نويسنده ,
Issue Information :
دوماهنامه با شماره پیاپی سال 2000
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Abstract :
Powder metallurgy (P/M) processes are widely used to manufacture metallic or ceramic net shape parts. In order to help optimize these processes (in particular die compaction, sintering and hot isostatic pressing), CEA-CEREM has developed a computer assisted design and modeling tool named PreCAD®. In the case of hot isostatic pressing (HIP), this tool is used to optimize the design of the initial mould in order to obtain a very accurate part after compaction. In the case of die compaction, it can be used to optimize toolings (die, punches) geometries and pressing sequences in order to: (1) increase parts accuracy and thus limit post-sintering operations (sizing or machining); and (2) decrease the percentage of rejected parts due to the presence of cracks. This tool has been fully validated on real parts in the case of HIP (ISOPREC® process) and is now industrially used. An accuracy of ±50 μm between simulated and manufactured geometries is obtained. Prediction of the relative density is better than 1%. All aspects of PreCAD® are presented in this paper with several industrial examples of applications for the different P/M processes.
Keywords :
Numerical modeling , Net shape , Powder metallurgy processes
Journal title :
Materials and Design
Link To Document :