Obvious increase of hardness and wear lifetime has been observed for high dose pulse Ti
C and Ti+ C dual implanted H13 steel.The Ti+ C dual implantation is better than implantation with other ions.It is shown that the implanted Ti and C concentration can reach 22% and 45% respectively
the over-saturated solid solution of C and Ti appeares
and hardening of solid solution is formed in the implanted layer. The dispersive hardening phases such as Fe2C3
Fe5C2
Fe2Ti and TiC are formed. There is a thin carbon film on the surface of Anplanted layer