As the high manganese steel is treated by "top step process” in steelmaking furnace and in ladle using V

slag

+ Ti + Zn compound inoculation agent

the inoculation effect to control and improve precipitated amount and morphology of carbide

clean grain boundary and fine grain shall be got. Hie dynamics effects of compound inoculation modified effect of rare earth elements

composition of liquid steel

microalloying elements

inoculation composition and interface fluctuation are presented in this paper. Hie application results showed that the as cast mechanical properties of 0.90~1.15C

11.5~14.0Mn

1.0~1.5Cr high manganese steel were obviously improved by V

slag

+ Ti + Zn compound inoculation treatment

the tensile strength

elongation and impact toughness of steel were respectively increased to 491 MPa

8.4% and 23 J/cm

2

from 401 MPa

3.7% and 2.3 J/cm

2

.