Al-PLACED STEEL SHEET USED FOR HOT PRESSING AND METHOD OF MANUFACTURE OF Al-PLACED STEEL SHEET USED FOR HOT PRESSING Russian patent published in 2018 - IPC C23C2/12 C23C2/28 C23C2/40 B21D22/20 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to the production of Al-plated steel sheet used for hot pressing. It has excellent hot lubricity, excellent corrosion resistance after coating and excellent spot weldability. Al-plated steel sheet includes a steel sheet, an Al deposit layer formed on one or both surfaces of the steel sheet, and a surface film layer formed on the Al deposit layer. Surface film layer comprises a zinc compound, the zinc compound adheres to the Al deposit layer of the steel sheet in an amount, equal or greater than 0.3 g/m² and equal to or less than 1.5 g/m², defined as the amount of metallic zinc per surface, and the weight of the zinc coating in any continuous area of 1 mm², defined as the maximum amount of precipitated zinc in the measurement area, obtained by performing an analytical mapping of the zinc distribution on the surface of Al-plated steel sheet using an electron probe microanalyzer (EPMA) is 1.5 g/m² or less.

EFFECT: invention relates to the creation of an Al-plated steel sheet used for hot pressing.

20 cl, 1 dwg, 2 tbl