Iron-based alloy for use in molds for plastics

Details Iron-based alloy for use in molds for plastics Iron-based alloy for use in molds for plastics

C - Chemistry, Metallurgy

22

C

C22C 38/24 (2006.01) B29C 33/38 (2006.01) C22C 38/00 (2006.01) C22C 38/22 (2006.01)

Patent

CA 2167221

The use of a chromium-containing martensitic alloy for plastic molds is described. The use properties of a thermally-treated plastic mold of a hardness of at least 45 Rockwell C are improved by an iron-based alloy including, in weight-%: C 0.25 to 1.0, preferably 0.4 to 0.8; N 0.10 to 0.35, preferably 0.12 to 0.29; Cr 17.0 to 25.0, preferably 17.0 to 19.0; Mo 0.5 to 3.0, preferably 0.8 to 1.5; and V 0.04 to 0.1, preferably 0.05 to 0.1, where the sum of the concentration of carbon and nitrogen results in a value of, in weight-%, at least 0.5 and no more than 1.2, preferably at least 0.61 and no more than 0.95, the remainder including iron and melt-related impurities.

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