| 摘要 |
<p>The process, e.g. for welding metal pipes or sheets, uses a combination of an electric arc (6) and a laser beam (1) to melt a filler wire (2) of less than 1.2 mm diameter, delivered at a rate of at least 20 m per minute to achieve a welding speed of at least 2 m per minute. The metals to be welded can be of carbon steel or stainless steel, with the arc produced by a current of preferably 400-500 A, and the laser beam produced by a CO2, YAG or diode laser. During welding the weld zone is shielded from the ambient air by a protective gas (3) of helium, argon and oxygen or CO2 fed under the welding nozzle (4).</p> |
