Grain-oriented electrical steel sheet and manufacturing method therefor

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United States of America Patent

PATENT NO 10851431
APP PUB NO 20180002772A1
SERIAL NO

15537749

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Abstract

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A method for manufacturing a grain-oriented electrical steel sheet, according to an embodiment of the present invention includes: heating a slab, based on 100 wt % of a total composition thereof, including N at 0.0005 wt % to 0.015 wt %, Ti at 0.0001 wt % to 0.020 wt %, V at 0.0001 wt % to 0.020 wt %, Nb at 0.0001 wt % to 0.020 wt %, B at 0.0001 wt % to 0.020 wt %, and the remaining portion including Fe and other impurities, and then hot rolling it to prepare a hot-rolled steel sheet; annealing the hot-rolled steel sheet; after the hot-rolled steel sheet is annealed, cooling the hot-rolled steel sheet, and then cold rolling it to prepare a cold-rolled steel sheet; decarburization-annealing the cold-rolled steel sheet and then nitriding-annealing it, or simultaneously performing the decarburization-annealing and the nitriding-annealing; and final-annealing the decarburization-annealed and nitriding-annealed steel sheet.

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Patent Owner(s)

  • POSCO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Han, Kyu-Seok Pohang-si, KR 19 272
Joo, Hyung Don Pohang-si, KR 14 10
Ko, Hyun-Seok Pohang-si, KR 28 87
Park, Jong-Tae Pohang-si, KR 32 289
Seo, Jin-Wook Pohang-si, KR 127 1611

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