Ti-6Al-4V 합금의 레이저 용접성에 관한 기초 연구(Part I : 레이저 출력, 용접 속도의 영향도 분석)
A Basic Study on the Laser Weldability of Ti-6Al-4V Alloys(Part I: Analysis of the Influence of Laser Power and Welding Speed)
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Titanium constitutes approximately 60% of the weight of steel and exhibits strength comparable to steel's but with a higher strength-to-weight ratio. Titanium alloys possess excellent corrosion resistance due to a thin oxide layer at room temperature; however, their reactivity increases above 600°C, leading to oxidation and nitridation. Welding titanium alloys presents challenges such as porosity issues. Laser welding minimizes the heat-affected zone (HAZ) by emitting high output in a localized area for a short duration. This process forms a narrow and deep HAZ, reducing the deterioration of mechanical properties and decreasing the contact area with oxygen. In this study, fiber laser welding was conducted on 8.0mm thick Ti-6Al-4V alloy using the Bead On Plate (BOP) technique. A total of 25 welding conditions were experimented with to observe bead shapes. The results demonstrated successful penetration within the 0.792mm to 8.000mm range. It was concluded that this experimental approach can predict diverse welding conditions for Ti-6Al-4V alloys of various thicknesses.
Abstract
Titanium constitutes approximately 60% of the weight of steel and exhibits strength comparable to steel's but with a higher strength-to-weight ratio. Titanium alloys possess excellent corrosion resistance due to a thin oxide layer at room temperature; however, their reactivity increases above 600°C, leading to oxidation and nitridation. Welding titanium alloys presents challenges such as porosity issues. Laser welding minimizes the heat-affected zone (HAZ) by emitting high output in a localized area for a short duration. This process forms a narrow and deep HAZ, reducing the deterioration of mechanical properties and decreasing the contact area with oxygen. In this study, fiber laser welding was conducted on 8.0mm thick Ti-6Al-4V alloy using the Bead On Plate (BOP) technique. A total of 25 welding conditions were experimented with to observe bead shapes. The results demonstrated successful penetration within the 0.792mm to 8.000mm range. It was concluded that this experimental approach can predict diverse welding conditions for Ti-6Al-4V alloys of various thicknesses.
참고문헌 (10)
- 변율, "용접 후열처리에 따른 Ti-6Al-4V 합금의 레이저 용접부 미세조직과 인장특성", 대한용접접합학회지, 35(4), pp.1~5 (2017), 대한용접접합학회[DOI]
- A. Mannucci, "Direct laser welding of pure titanium to austenitic stainlesssteel", Procedia CIRP, 74, pp.485~490 (2018)
- A. Schneider, "Laser Beam Welding of Thick Titanium Sheets in the Field of Marine Technology", Physics Procedia, 56, pp.582~590 (2014)
- 김종도, "파이버 레이저를 이용한 순 티타늄 박판의 용접특성 향상을 위한 연구 - 실드가스 노즐변수의 영향 -", 대한용접접합학회지, 34(5), pp.6~12 (2016), 대한용접접합학회
- 윤병현, "타이타늄 합금의 최신 용접기술 동향", 대한용접접합학회지, 25(5), pp.22~28 (2007), 대한용접접합학회
- 김종도, "티타늄 판재의 파이버 레이저 용접시 공정변수에 따른 용접특성 (I) - 실드가스 종류 및 유량에 따른 영향 -", 대한기계학회논문집 A, 40(12), pp.1047~1053 (2016), 대한기계학회
- 이우람, "티타늄 합금의 레이저 용접 공정 시 잔류 응력 저감 방안에 대한 연구", 대한용접접합학회지, 34(6), pp.35~41 (2016), 대한용접접합학회
- 임진택, "보호 가스 종류에 따른 Ti-6Al-4V 합금의 파이버 레이저 스마트 융합 용접 공정 특성", 한국과학예술융합학회, 38(4), pp.315~326 (2020), 한국전시산업융합연구원[DOI]
- 안영남, "Ti-6Al-4V 합금의 전자빔 및 레이저용접 특성", 대한용접접합학회지, 29(6), pp.624~628 (2011), 대한용접접합학회
- 고성훈, "레이저 점 용접의 키홀 발생과 안정성에 대한 해석", 대한용접접합학회지, 20(4), pp.78~84 (2002), 대한용접접합학회