Analysis on Failure Reasons of Tablet Press Dies

Curling and breaking failure occurred to the tablet press dies during the process of using. The failure reasons of the tablet press dies were analyzed by means of chemical composition analysis, hardness testing, metallographic examination and fracture morphology analysis. The results show that the failure of the tablet press dies was caused by amounts of inclusions and other defects in the raw material of dies. Improvement measures were suggested that qualified raw materials should be selected and quality inspection should be done to the raw materials.