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CO₂레이저 용접변수가 알루미늄 합금 용입에 미치는 영향
윤종원 동의대학교 산업기술개발연구소 2001 産業技術硏究誌 Vol.15 No.-
The effect of major laser welding parameters such as laser power, weld speed, focus position and flow rate of shielding gas on the weld penetration was studied for the CO2 laser welding of aluminum alloys. The influence of the V groove joint preparation on the laser beam absorption was also studied in comparison with the laser beam absorption for the flat surface of the aluminum alloys. As laser power increased and weld speed decreased, penetration increased. It was observed that there is optimal range for the focus position and the flow rate of He shielding gas when laser welding aluminum alloys. When V groove weld joint is used, beam absorption was more efficient compared with the flat surface.
5052 알루미늄 합금 레이저 용접부의 기계적 성질에 관한 연구
윤종원,이윤상,이문용,정병훈 한국레이저가공학회 2003 한국레이저가공학회지 Vol.6 No.1
5052 aluminum alloy sheets of 2mm thickness were butt welded using a continuous wave Nd:YAG laser with and without Ar shielding gas. Vickers hardness, transverse-weld tensile and bulge tests were carried out to investigate the effect of Ar shielding gas on the mechanical properties and formability of laser welds. Porosity in the weld metals was investigated using an optical microscope. Mechanical properties and formability of 5052 aluminum alloy laser welds were degraded compared to those of base metal. However, those properties were improved due to the reduced size and number of porosity when Ar shielding gas was used.