Primary material for molds adapted to mold plastics

摘要

A mold material having a material hardness higher than 340 HB and a fine-grain structure. The mold material having a composition in weight percent that includes:
C=0.25-0.35Si=0.04-0.20Mn=1.00-2.00Cr=1.00-2.00Ni=0.30-less than 0.90Mo=0.30-0.80V=less than/equal to 0.20Al=0.01-0.03N=0.0025-0.0150S=less than 0.15

a remainder of Fe and impurities.

主权项

1. A primary material adapted for use in a mold for molding plastics, the material comprising, in a tempered state, a composition having a material hardness of higher than 340 HB and the composition consisting essentially of, in weight percent:
C=0.25 to 0.35 Si=0.04 to 0.20 Mn=1.00 to 2.00 Cr=1.00 to 2.00 Ni=0.30 to less than 0.90 Mo=0.30 to 0.80 V=less than/equal to 0.20 Al=0.01 to 0.03 N=0.0025 to 0.0150 S=less than 0.15 a remainder of Fe and impurities.