Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Reexamination Certificate
2005-05-03
2005-05-03
Koehler, Robert R. (Department: 1775)
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
C428S609000, C428S939000, C148S533000, C148S534000, C148S579000, C148S601000, C148S902000
Reexamination Certificate
active
06887590
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.
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patent: 5997664 (1999-12-01), Tahara et al.
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Lompman, E.A.: ASM Handbook, Oct. 1995; ASM International; Metals Park, US; pp. 345-346.
Berndsen Horst
Friedel Frank
Meurer Manfred
Westholt Michael
Zeizinger Sabine
Koehler Robert R.
Proskauer Rose LLP
Thyssen-Krupp Stahl AG
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