| 摘要 |
PROBLEM TO BE SOLVED: To improve the high temp. softening resistance and the wear resistance of a matellic mold and to enable use as HIP(hot isostatic pressing) state by using a cobalt base alloy or a nickel base alloy excellent in high temp. softening resistance and wear resistance on an engraving surface material of the metallic mold and specifying the component composition of a tool steel as the base material. SOLUTION: The portion for mold engraving surface of the metallic mold is made of Co base alloy or Ni base alloy and a melting or powder-made hot tool steel composed, by wt.%, of 0.1-0.55 C, <=1.2 Si, 0.3-2.0 Mn, 0.3-2.0 Ni, 1.0-4.0 Cr and 0.2-3.0 Mo and/or 0.4-6.0 W (0.2-3.0 1/2 W+Mo) and further, 0.05-0.7 V and/or 0.01-0.15 Nb, and if necessary, 0.2-3.0 Co and the balance Fe, is used as the metallic mold base material, and the mold engraving surface material and the base material are clad with the HIP treatment. The metallic mold is improved in service life and has good machinability as the HIP finished state as it is.
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