CAUSE AND PREVENTION OF COMPACT CRACK DURING POWDER METALLURGY PRESSING

As important technology of powder metallurgy,provided with outstanding superiority cold isostatic pressing replaces normal compacting techniques in many fields.Aiming at under certain conditions cracks occurring during cold isostatic pressing,from the aspect of each step of the whole cold isostatic pressing,such as powder characteristics,moulding material,filling and compacting,pressure maintaining,pressure releasing,demoulding and etc.From every step of the whole compacting process for cold isostatic pressing to metal powder which include: the features of powder,materials of mould,filling and compaction,pressure maintaining,pressure release,demoulding and so on,this article analyzes each possible cause of cracks and the corresponding prevention measurement.