Effect of Si Content on Mechanical Properties of a Mo and V Free Low Alloy Cast Steel for Automobile Cold Pressing Die

The effects of Si content on combinations of important properties such as hardness,hardenability,and weld- ability in addition to strength increment were systematically investigated to develop a Mo and V free low alloy cast steel for automobile cold pressing die insert.For the evaluation of the applicability as the die in- sert,the mechanical properties were measured after spheroidization annealing (SA),quenching and tempering (Q/T),and flame hardening (FH) treatments,respectively.The developed 0.8%-1.6%Si containing Mo and V free alloy cast steels showed excellent matrix strengthening effect,hardenability,and weldability,fulfilling the industrial criterion of the mechanical properties for the die insert.