The tablet punch die is one kind of mold used in medicinal powder stamp forming.In order to control medicine dosage in allowable deviation scope,the demand for die's size precision,wear-resisting performance and anti-impact properties is very high.In this article conventional heat treatment of this kind of die and its failure behavior are analyzed,and phase transformation method by laser was adopted to harden the die.The results indicate:The phase transformation hardening by laser can improve the mechanical properties of tablet punch die compared with tradi...