Based on research of main composition alloying principle for hot working die steel

the studied new precision casting hot working die steel was melted by a 250 kg medium frequency induction furnace and the wearing test on test steels at 400 ℃ was carried by MG2000 high temperature friction-wear testing machine. The research results showed that according  to      the principle of V/C-3.0

C

res

-0. 1%～0.2%

Cr/(Cr+Mo)-0.68~0.85

Cr/C

res

->16.6

Mo/C

res

->16

a  designed new precision  casting hot working  die  steel-0.32C

3.54Cr

2.41Mo

1.02V had higher high-temperature wear resistance

of which the high-temperature wear rate at 400 ℃ was 30% that of 0.45C- 5.3Cr-  1.4Mo-0.83V hot working die steel H13 and was 20%～25% that of 0.37C-2.48Cr-7.82W-0.41V die steel 3Cr2W8V.