| 摘要 |
The invention relates to a steel alloy of the following composition (in % by weight) C 0.40-0.60 Si 0.1-1.0 Mn 0.3-1.0 Cr 12-15 MO 2.5-4.0 Ni 0-1.0 Co 0-4.0 N 0.15-0.20, with the balance Fe as well as normally occurring impurities, the hardness being >56 HRC, which has been attained without deep freezing, as well as PRE>25, defined as PRE=% Cr+3.3.% Mo+16.% N. Furthermore, the steel alloy comprises carbides, nitrides and/or carbonitrides the maximal diameter of which does not exceed 5 mum. This steel alloy has turned out surprisingly well suitable as edge material for a plurality of cutting operations.
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