Method for making sealed flux-cored wire for arc welding

Details Method for making sealed flux-cored wire for arc welding Method for making sealed flux-cored wire for arc welding

B - Operations, Transporting

23

K

B23K 35/40 (2006.01) B23K 35/02 (2006.01) B23K 35/38 (2006.01)

Patent

CA 2318456

The invention concerns a method for making metal tubes containing filler elements, in particular sealed flux-cored welding wires, using a protecting gaseous atmosphere with controlled content so as to avoid or minimise any intrusion of gaseous atmospheric impurities in said flux-cored wires, such as in particular nitrogen, hydrogen and moisture. The resulting welded sealed flux-cored wires are substantially free of gaseous nitrogen, preferably entirely free of gaseous nitrogen, water vapour and gaseous hydrogen, and can be used in TIG, MIG, MAG and submerged arc welding processes.

L'invention a trait à un procédé et à un dispositif de fabrication de tubes métalliques contenant des éléments de remplissage, notamment de fils fourrés étanches de soudage, mettant en oeuvre une atmosphère gazeuse de protection à teneur contrôlée, de manière à éviter ou minimiser toute introduction d'impuretés atmosphériques gazeuses dans lesdits fils fourrés, tel notamment l'azote, l'hydrogène et l'humidité. Les fils fourrés étanches soudés susceptibles d'être ainsi obtenus sont substantiellement exempts d'azote gazeux, de préférence totalement exempt d'azote gazeux, de vapeur d'eau et d'hydrogène gazeux, et sont utilisables dans les procédés de soudage à l'arc, notamment les procédés de soudage TIG, MIG, MAG et à l'arc submergé.

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