PLATED HIGH-STRENGTH CORROSION-RESISTANT STEEL Russian patent published in 2017 - IPC C22C38/38 C22C38/32 B32B15/18 B32B15/01 

FIELD: metallurgy.

SUBSTANCE: plated steel consists of the cladding layer, made of corrosion-resistant austenitic steel and the base layer made of low-carbon, high-strength, microalloyed steel. The main layer steel contains the components in the following ratio, wt %: C 0.070-0.120, Si 0.10-0.50, Mn 0.5-2.0, P ≤0.03, S ≤0.005, Al 0.015-0.09, Nb 0.04-0.08, Ti 0.02-0.04, Cr ≤0.50, N ≤0.01, V 0.03-0.06, B 0.002-0.005, iron and unavoidable impurities are the rest. The titanium and nitrogen, niobium and carbon contents are related by the formula: [Ti]/[N] = 4-8 and [Nb]⋅[C] = 0.004-0.008. The steel has continuity and strength of joining layers - at least 450 N/mm², the strength - not less than 850 N/mm², the cold resistance KCU_-70°_C - not less than 80 J/cm², the corrosion resistance, the weldability and ductility.

EFFECT: required complex of technological and service properties is provided.

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