| 摘要 |
<p>Plasma keyhole welding involves generating plasma beam by using welding electrode. The welding electrode is impinged with a gas composition including welding gas, where the gas composition is changed temporally during welding operation according to boundary conditions. An independent claim is also included for an apparatus, which comprises an electrode for supplying welding current, a nozzle and gas supply unit for providing gas composition with welding gas.</p> |
