ALLOYED STEEL, HOLDER OR PART OF HOLDER FOR TOOL FOR PLASTIC MOULDING, STRENGTHENED WITH QUENCHING WORK PIECE FOR HOLDER OR PART OF HOLDER, PROCEDURE FOR PRODUCTION OF ALLOYED STEEL Russian patent published in 2011 - IPC C22C38/44 C21D1/78 

FIELD: metallurgy.

SUBSTANCE: steel contains, wt %: 0.08-0.19 C, 0.16≤C+N≤0.28, 0.1-1.5 Si, 0.1-2.0 Mn, 13.0-15.4 Cr, 0.01-1.8 Ni, 0.01-1.3 Mo, to 0.7 V maximally, possible, S at amount up to 0.25S, and also, possible, Ca and O at amounts to 0.01 Ca, to 0.01 O, iron and unavoidable impurities - the rest. Also, micro-structure of steel in state hardened with quenching corresponds to martensite containing to 30 vol. % of ferrite. Procedure for production of steel consists in production of steel, in hot treatment of steel ingot in interval of temperature 1100-1300°C, in quenching by steel cooling, in double tempering steel during 2 hours at temperature 510-650°C.

EFFECT: raised mechanical properties, hardenability, corrosion resistance and ability to buffing.

15 cl, 8 dwg, 6 tbl