| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot tool steel in which the balance of the various characteristics of hardenability, spheroidizing annealing property, machinability, thermal conductivity, corrosion resistance and softening resistance is well-taken.SOLUTION: The hot tool steel has a composition comprising, by mass%, 0.25<C<0.45, 0.29<Si<0.40, 0.52<Mn<0.9, 5.95<Cr<6.79, 1.23<Mo<1.51, 0.40<V<0.60, and the balance Fe with inevitable impurities. As the application of the hot tool steel, e.g., a die casting mold, a die quenching mold, a mold for hot forging, a mold for warm-hot forging or the like can be given. |
