The steel grades and characteristics of traditional and new developed hot working die steels at home and abroad including die steels for hot forging

hot extrusion and pressured casting

as well as for special properties service are presented in this article

while the research progress on heat treatment and surface treatment for hot working die steel is introduced. At present

increasing cleanliness of die steels

homogenizing and fining structure

and developing new grades and processes of hot working die steel by computer simulation technology are important methods to increase service life of hot working die steels.