Abstract
1. Alloying and heat treatment of tool steels for water-cooled dies to improve the service life in high-speed automatic presses must ensure: 1) The lowest but still sufficient level of hardening during precipitation hardening; 2) the smallest amount of carbide not dissolved during quenching; 3) prevention of the decomposition of martensite in grain boundaries during tempering; 4) a structure of lath martensite. 2. Production tests of tools made of steel 3Kh4M2FS (EP929) in place of standard steel 3Kh3M3F showed an increase in tool life of 30–80%, operation of the equipment for an entire work shift, and substantial savings −44,900 rubles per press.
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