FIELD: metallurgy.
SUBSTANCE: steel contains, in wt %, C: from 0.40 or more to 0.75 or less, Si: from 0.002 or more to 3.0 or less, Mn: from 0.20 or more to 2.0, or less, S: from 0.002 or more to 0.1 or less, Al: from more than 0.10 to 3.0 or less, P: 0.030 or less and N: 0,035 or less, and the rest - Fe and inevitable impurities. Steel may additionally contain one or more components of: B, from 0.0004 or more to 0.005 or less, Ti: from 0.004 or more to 0.10 or less, Cr: from 0.05 or more to 1.50 or less , Mo: from 0.05 or more to 0.6 or less, Nb: from 0.005 or more to 0.2 or less, V: from 0.01 or more to 1.0 or less, Sb: from 0.0005 or more to 0.0150 or less, Sn: from 0.005 or more to 2.0 or less, Zn: from 0.0005 or more to 0.5 or less, Te, from 0.0003 or more to 0.2, or less, Bi: from 0.005 or more to 0.5 or less, Pb: from 0.005 or more to 0.5 or less, Mg: from 0.0002 or more to 0.003, or less, Ca: from 0.0003 or more to 0.003 or less, Zr: from 0.0003 or more to 0.005 or less, REM: from 0.0003 or more to 0.005 or less, Ni: from 0.05 or more to 2.0 or less, Cu: from 0.01 or more to 2.0 or less. The content of Al and N satisfies the following relationship: [%Al]-(27/14)×[%N]-0.001>0,10%, in which [Al] is the aluminium content in wt %, and [N] means the nitrogen content in wt %.
EFFECT: increased workability of steel.
8 cl, 1 dwg, 6 tbl, 1 ex
