| 摘要 |
<p>The present invention has the objective of eliminating the inert or active shielding gas used during the welding operations of the welding processes GMAW (MIG-MAG) and FCAW (dualshield), thus reducing the welding costs by eliminating, for instance, the location and maintenance contracts of thanks, distribution lines, instrumentation, location and maintenance contracts of cylinders, cylinder handling in the manufacture areas and, evidently, what is more important, the direct cost of the shielding gas. This objective is achieved by using a self-shielded welding wire, that is to say, one which generates its own shielding gas. The wire is coated with at least one layer of a flexible material. The burning of it generates gases which form the protecting atmosphere.</p> |
