| Автор | Toru Narikiyo |
| Автор | Hiroshi Miura |
| Автор | Shigeki Fujinaga |
| Автор | Akira Ohmori |
| Автор | Katsunori Inoue |
| Дата выпуска | 1998-09-21 |
| dc.description | Two different types of Nd:YAG laser oscillators are used simultaneously in order to increase the weld penetration depth. A rectangularly modulated CW beam emitted from a CW-pumped laser oscillator together with a pulse beam emitted from a pulse-pumped oscillator is irradiated onto stainless steel (304). This paper investigates the contribution of a pulsed beam to welding characteristics in two-laser-beam welding. A pulsed beam with high peak power is effectively combined with a modulated CW beam for adjusting the power density in order to obtain deep penetration. The plume is extinct during modulated CW beam irradiation after the emission of a pulsed beam under deep penetration conditions. On the basis of this phenomenon, keyhole behaviour could be considered and it is recognized that a pulsed beam with high peak power would play a significant role in enlarging the keyhole. A strong correlation between the penetration depth and the plume extinction time is apparent. Therefore, the keyhole might be temporarily but sufficiently enlarged and penetration might be consequently deepened by a pulsed beam with high peak power. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Plume behaviour during welding with two Nd:YAG laser beams combined |
| Тип | paper |
| DOI | 10.1088/0022-3727/31/18/020 |
| Electronic ISSN | 1361-6463 |
| Print ISSN | 0022-3727 |
| Журнал | Journal of Physics D: Applied Physics |
| Том | 31 |
| Первая страница | 2331 |
| Последняя страница | 2337 |
| Выпуск | 18 |
