Method of butt-welding a coated steel plate

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United States of America Patent

PATENT NO 9375809
APP PUB NO 20160008928A1
SERIAL NO

14865747

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Abstract

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A method of butt-welding steel plates is provided. The method includes the steps of coating a first steel plate by dipping the first steel plate in a molten bath to obtain a first precoat upon the first steel plate. The first precoat includes a first intermetallic alloy layer and a first metal alloy layer, the first intermetallic alloy layer is topped by the first metal alloy layer. On a first face of the first steel plate, the first metal alloy layer is removed in a first area at a first periphery of the first steel plate, while at least part of the first intermetallic alloy layer in the first area remains. A second steel plate is coated by dipping the second steel plate in the molten bath or a further molten bath to obtain a second precoat upon the second steel plate. The second precoat includes a second intermetallic alloy layer and a second metal alloy layer, the second intermetallic alloy layer is topped by the second metal alloy layer. On a second face of the second steel plate, the second metal alloy layer is removed in a second area at a second periphery of the second metal plate. While at least part of the second intermetallic alloy layer in the second area remains. After removal of the first and second metal alloy layers, the first periphery of the first steel plate is butt-welded to the second periphery of the second steel plate to form a welded blank.

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Patent Owner(s)

Patent OwnerAddress
ARCELORMITTAL FRANCE93200 SAINT DENIS

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Canourgues, Jean-Francois Nogent sur Oise, FR 13 161
Ehling, Wolfram Ghent, BE 27 249
Pic, Aurelien Paris, FR 14 165
Thommes, Bernd Okemos, US 13 161
Verrier, Pascal Lumbres, FR 16 180
Vierstraete, Rene Maisons-Laffitte, FR 19 191

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