PROCESS TO MANUFACTURE GRAIN-ORIENTED ELECTRICAL STEEL STRIP AND GRAIN-ORIENTED ELECTRICAL STEEL PRODUCED THEREBY
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United States of America Patent
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Issued Date -
Sep 6, 2012
app pub date -
Nov 24, 2010
filing date -
Nov 25, 2009
priority date (Note) -
Abandoned
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Abstract
A process to manufacture grain-oriented electrical steel (GOES) strip and a product produced by the process are provided. A molten silicon-alloyed steel is continuously cast in a strand having a thickness in the range of from 50 to 100 mm and subjected to hot- rolling in a plurality of uni-directional rolling stands to produce final hot-rolled strip coils having a thickness in the range of from 0.7 to 4.0 mm followed by a continuous annealing the hot-rolled strip, cold rolling, continuous annealing the cold-rolled strip to induce primary recrystallisation and, optionally, decarburization and/or nitriding, coating the annealed strip, annealing the coiled strip to induce secondary recrystallisation, continuous thermal flattening annealing of the annealed strip and coating the annealed strip for electric insulation.
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