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김경학(Kyounghak Kim),방한서(Hansur Bang),방희선(Heeseon Bang),Alexander F. H. Kaplan,Jonas Nasstrom,Jan Frostevarg 대한용접·접합학회 2016 대한용접·접합학회지 Vol.34 No.5
In this study, Hot-wire laser welding (HWLW) without keyhole which deposits filler material by feeding hot wire into the process zone has been performed to increase process performance. From the analysis of High Speed Imaging (HSI), for higher voltage, the process is prone to arc formation and drop transfer, which is disagreeable transfer mode. It is necessary that arc formation and drop (globular) transfer should be avoided by lower voltage. Therefore, continuous wire melting and transfer mode is preferred when adopting this process. The HWLW technique has high potential in terms of performance, precision, robustness and controllability for thick section of narrow gap.