| 摘要 |
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. |
