FORGING STEEL Russian patent published in 2011 - IPC C22C38/60 C22C38/58 C22C38/44 C22C38/40 C22C38/38 C22C38/34 C22C38/22 

FIELD: metallurgy.

SUBSTANCE: steel contains, wt %: C from 0.001 to less 0.07, Si 3.0 or less, Mn from 0.01 to 4.0, Cr 5.0 or less, P 0.2 or less, S 0.35 or less, Al from 0.0001 to 2.0, N 0.03 or less, one or both from Mo 1.5 or less and Ni 4.5 or less, iron and unavoidable impurities - the rest. Steel has strain hardening exponent Di calculated from expression Di = 5.41 × Di(Si) × Di(Mn) × Di(Cr) × Di(Mo) × Di(Ni) × Di(Al), 60 or more.

EFFECT: steel possesses reduced resistance to deforming at cold, warm and hot pressing and required level of strength upon heat treatment after pressing.

9 cl, 5 dwg, 4 tbl, 1 ex