METHOD OF SHEET STEEL ANNEALING Russian patent published in 2018 - IPC C23C8/18 C21D9/67 C23C2/06 

Abstract RU 2647419 C2

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy. To increase the strength of the sheet steel and reduce its specific weight, an annealing of the sheet steel is carried out comprising the first step, consisting in the complete oxidation of the sheet steel surface and thereby creating a completely oxidized surface layer, the second step, consisting in the selective oxidation of other, in addition to iron, elements of steel in the area that continues under said fully oxidized layer, thus creating a selectively oxidized inner layer and the third step, consisting in the complete reduction of said fully oxidized surface layer.

EFFECT: increased strength and reduced specific weight of sheet steel.

15 cl, 2 tbl

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RU 2 647 419 C2

Authors

Rotoul, Dzhon

Shtaudte, Jonas

Maten, Zhan-Mishel

Dates

2018-03-15Published

2013-12-10Filed