ALLOYED STEEL SHEET ELECTROPLATED BY DIPPING Russian patent published in 2016 - IPC C23C2/00 C21D9/46 C22C38/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy. Alloyed electroplated steel sheet contains the following elements in wt %: C - 0.10-0.4, Si - 0.01-0.5, Mn - 1.0-3.0, O - 0.006 or less, P - 0.04 or less, S - 0.01 or less, Al - 0.1-3.0, N - 0.01 or less, Fe and unavoidable impurities making the rest. The steel sheet structure contains the following structures, vol %: bainite and martensite - 40 or more, residual austenite - 8-60, ferrite - less than 40, unavoidable structure making the rest. Steel sheet surface is subjected to electroplating by dipping with alloying. The sum of G1 ply depth Tγ1 and ply G depth Tγ in alloyed electroplated ply produced by dipping makes 2 mcm or less. Depth ratio Tγ1/Tγ between said phase G1 and G makes 1 or less.

EFFECT: ruled out separation of cover ply in machining.

4 cl, 1 dwg, 2 tbl