| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: it is implemented steel making, containing, wt %: carbon 0.045-0.12, silicon not more than 0.50, manganese 0.35-1.15, aluminium 0.01-0.09, nitrogen not more than 0.010, niobium and/or titanium - 0.01-0.08, iron and unavoidable admixtures - the rest, pouring, hot rolling with finishing temperature in the range 830-880C, cooling by water, winding of strips into coils in the range 510-640C. Steel additionally contains, wt %: vanadium 0.01-0.08, calcium 0.0005-0.010, herewith total content of niobium, titanium and vanadium mustn't exceed 0.117 wt %. ^ EFFECT: strength properties increasing of steel at saving of formability and receiving of hot-rolled mill products of required strength grade. ^ 7 cl, 6 tbl |
