Patent · US Active

Method for producing a grain-orientated electric strip

US9905344B2 · kind B2 · utility

0Cited by

16References

17Claims

0Family size

Assignee

ThyssenKrupp Electrical Steel GmbH · DE

Inventors

Christof Holzapfel · Gelsenkirchen, DE
Stefan Pahike · Gelsenkirchen, DE
Carsten Schepers · Raesfeld, DE
Heiner Schrapers · Duisburg, DE

Key dates

Filing date	Sep 21, 2011
Grant date	Feb 27, 2018
Priority date	—
Expiry date	Jul 16, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/12854
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to a method for producing a grain-orientated electric steel which is coated with a phosphate layer and in which there is applied to the electric steel a phosphate solution which contains a colloid component and at least one colloid stabilizer (A) and/or at least one pickling inhibitor (B), the phosphate solution containing at least one compound which has chromium in the oxidation stage III (chromium (III) compound).Grain-orientated electric steel produced with the method according to the invention is distinguished by excellent optical properties and a high tensile stress.

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