마그네슘 합금의 레이저 용접성에 관한 기초 연구(Part I : 레이저 출력, 용접 속도의 영향도 분석)
A Basic Study on the Laser Weldability of Magnesium Alloys(Part I: Analysis of the Influence of Laser Power and Welding Speed)
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Research into lightweighting to improve vehicle fuel efficiency and reduce exhaust emissions continues as environmental regulations become increasingly stringent. Magnesium alloys, chosen for their lightweight properties, are more than 35% lighter than aluminum alloys and also exhibit excellent mechanical characteristics. While magnesium alloys are commonly utilized in arc welding processes like GTAW and GMAW, they pose challenges such as high residual stresses and welding defects. Laser welding, on the other hand, offers the advantage of precise heat input, enabling deep and high-quality welds while minimizing welding distortion. In this study, fiber laser welding was employed to weld a 4.0mm thick AZ31B-H24 using the Bead on Plate technique. A total of 10 different welding conditions were tested with fiber laser welding, and the cross-sections of the weld beads were examined. Weld bead shapes were measured based on five parameters. The results allowed for an evaluation of the weldability of AZ31B-H24 using fiber laser welding.
Abstract
Research into lightweighting to improve vehicle fuel efficiency and reduce exhaust emissions continues as environmental regulations become increasingly stringent. Magnesium alloys, chosen for their lightweight properties, are more than 35% lighter than aluminum alloys and also exhibit excellent mechanical characteristics. While magnesium alloys are commonly utilized in arc welding processes like GTAW and GMAW, they pose challenges such as high residual stresses and welding defects. Laser welding, on the other hand, offers the advantage of precise heat input, enabling deep and high-quality welds while minimizing welding distortion. In this study, fiber laser welding was employed to weld a 4.0mm thick AZ31B-H24 using the Bead on Plate technique. A total of 10 different welding conditions were tested with fiber laser welding, and the cross-sections of the weld beads were examined. Weld bead shapes were measured based on five parameters. The results allowed for an evaluation of the weldability of AZ31B-H24 using fiber laser welding.
참고문헌 (11)
- B. Mordike, "Magnesium: Properties — applications — potential", Materials Science and Engineering: A, 302(1), pp.37~45 (2001)
- Z. Yang, "Review on Research and Development of Magnesium Alloys", Acta Metallurgica Sinica, 21(5), pp.313~328 (2008)
- 한국철강신문, "마그네슘합금의 기초 및 응용", ~ (2004)
- 김현우, "마그네슘 합금 판재(AZ31B)의 온도 및 성형속도에 따른 2D-draw 굽힘 특성 분석", 한국기계기술학회지, 21(2), pp.221~227 (2019), 한국기계기술학회[DOI]
- 김부민, "AZ60 마그네슘합금을 이용한 용접 공정별 접합부 특성 평가", 한국기계기술학회지, 19(2), pp.281~285 (2017), 한국기계기술학회[DOI]
- 김영식, "마그네슘합금의 레이저용접 기술동향", 대한용접접합학회지, 30(1), pp.8~18 (2012), 대한용접접합학회
- 이원배, "마찰교반용접한 AZ31B-H24 마그네슘 합금의 용접특성에 미치는 용접조건의 영향", 대한용접접합학회지, 20(5), pp.87~92 (2002), 대한용접접합학회
- 이목영, "마그네슘 박판 겹치기 이음부의 레이저 용접성에 관한 연구", 대한용접접합학회지, 37(4), pp.293~298 (2019), 대한용접접합학회[DOI]
- 이정한, "레이저 열원을 이용한 마그네슘 합금의 용접성에 관한 연구 (Ⅰ) - AZ31B-H24 및 AZ31B-O의 레이저 용접성 비교 -", 대한용접접합학회지, 30(5), pp.464~469 (2012), 대한용접접합학회
- 이정한, "레이저 열원을 이용한 마그네슘 합금의 용접성에 관한 연구 (Ⅱ) - AZ31B-H24 및 AZ31B-O 레이저 용접부의 기계적 특성 -", 대한용접접합학회지, 30(6), pp.542~547 (2012), 대한용접접합학회
- 김종도, "파이버 레이저를 이용한 이종 마그네슘 합금의 용접성에 관한 연구", 대한용접접합학회지, 31(2), pp.63~68 (2013), 대한용접접합학회