FIELD: metallurgy.
SUBSTANCE: group of inventions relates to hot-stamped steel. Part of steel is tempered, or all steel is tempered and has a hardness corresponding to 85 % or less of the maximum quench hardness, defined as the Vickers hardness at a depth position spaced from the layer surface by 1/4 of the sheet thickness, when quenching in water after heating to a temperature equal to or higher than the temperature of point Ac3, and soaking for 30 minutes. Steel has a layer of zinc coating on said tempered part of the base metal. Above zinc coating layer comprises a lamella layer or a lamella layer and a solid solution layer. Above zinc coating layer has an excellent phosphatizing ability.
EFFECT: improved properties of steel associated with shock absorption is provided.
6 cl, 13 dwg, 2 tbl
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