Patent · US Active

Method for producing a nitrided packaging steel

US10920309B2 · kind B2 · utility

1Cited by

8References

20Claims

0Family size

Assignees

thyssenkrupp Rasselstein GmbH · DE
thyssenkrupp AG · DE

Inventors

Burkhard Kaup · Andernach, DE
Blaise Massicot · Burgbrohl, DE
Dirk Matusch · Neuwied, DE

Key dates

Filing date	Jul 2, 2015
Grant date	Feb 16, 2021
Priority date	—
Expiry date	Feb 17, 2038

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23F17/00
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A nitrided packaging steel in the form of a flat steel product and method for producing a nitrided packaging steel with a carbon content of 10-1000 ppm and uncombined nitrogen, dissolved in the steel, of more than 100 ppm. The nitriding is performed in two stages: a first stage, in which a molten steel is nitrided to a nitrogen content of at most 160 ppm by introducing a nitrogen-containing gas and/or a nitrogen-containing solid into the molten steel, and a second stage, in which a flat steel product produced from the nitrided molten steel by cold rolling is treated with a nitrogen-containing gas in order to increase further the amount of uncombined nitrogen in the flat steel product.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.