The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 2005
Filed:
May. 15, 2001
Sabine Zeizinger, Duisburg, DE;
Horst Berndsen, Duisburg, DE;
Frank Friedel, Moers, DE;
Manfred Meurer, Ratingen, DE;
Michael Westholt, Castrop-Rauxel, DE;
Sabine Zeizinger, Duisburg, DE;
Horst Berndsen, Duisburg, DE;
Frank Friedel, Moers, DE;
Manfred Meurer, Ratingen, DE;
Michael Westholt, Castrop-Rauxel, DE;
ThyssenKrupp Stahl AG, Duisburg, DE;
Abstract
The present invention relates to a method for the manufacture of galvannealed metal sheet, wherein a hot strip is produced from an IF steel containing 0.01 to 0.1 wt. % silicon, wherein the hot strip is coiled at a coiler temperature no lower than 700° C. and no higher than 750° C., wherein a cold strip is rolled from the coiled hot strip, wherein the cold strip is recrystallization-annealed in an annealing furnace in an annealing gas atmosphere, wherein the cold strip thus annealed is provided with a zinc coating in a zinc bath, and wherein the coated cold strip is post-annealed at a galvannealing temperature no lower than 500° C. and no higher than 540° C. The invention also relates to a galvannealed metal sheet which possesses improved adhesion of the coating layer to the base material and proposes a method which is suited for the manufacture of metal sheet having such properties.