Melting by Reflected Laser Beam during Vertical Welding via Hot-Wire Laser Welding

被引：0
作者：
Charunetratsamee S. [1 ]
Warinsiriruk E. [2 ]
Kenji S. [3 ]
Motomichi Y. [1 ]
机构：
[1] Graduate School of Engineering, Hiroshima University
[2] National Institute of Technology, Kure College
来源：
Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society | 2019年 / 37卷 / 04期
基金：
日本学术振兴会;
关键词：
Diode laser; Hot-wire; Laser welding; Laser-weaving condition; Reflected laser beam;
D O I：
10.2207/qjjws.37.208
中图分类号：
学科分类号：
摘要：
We investigated the melting of a base metal, molten pool growth, and joint creation during vertical welding via hot-wire-laser welding. Three laser-weaving conditions were investigated by changing the weaving frequency and waveform to study the effects of the irradiation duration near the groove surface. In addition, high-speed and cross-sectional imaging were performed to investigate the heating and melting processes on the groove surface during hot-wire laser welding. The irradiation duration near the groove surface in a cycle had a marked effect on the melting of the groove surface. The combination of a 5 Hz laser frequency with an exponential waveform led to a longer duration near the groove surface during a cycle and realized improved fusion compared with the other combinations with a 15 Hz laser frequency and a sine waveform. The laser beam reflected from the molten pool surface was the main source of heat for melting the groove surface. Hot-wire feeding provided a continuous and efficient supply of melted material and a stable heat input on the groove surface via the reflected laser beam. © 2019 Japan Welding Society. All rights reserved.
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页码：208 / 214
页数：6
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