• 제목/요약/키워드: MIG-welding

검색결과 125건 처리시간 0.029초

알루미늄 합금 Al 6061 MIG용접부의 기공에 관한 연구 (A Study on the Porosity in MIG Welding for Aluminum Alloy 6061)

  • 김영주;김대만;감병오;김성언;조상명
    • 대한용접접합학회:학술대회논문집
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    • 대한용접접합학회 2004년도 춘계 학술발표대회 개요집
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    • pp.179-181
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    • 2004
  • 알루미늄 및 알루미늄 합금은 철강 다음으로 사용량이 많은 비철 금속으로 그 용도는 매년 증가하고 있다. 항공기 부품에서 자동차, 선박 및 전자산업 등에 이르기까지 다양하게 사용되고 있으며 그 조립을 위한 용접기술의 중요성이 대두되고 있다. (중략)

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오버레이 용접법에 의한 Al-Cu 합금 경화후막의 특성 (A Characteristics of Thick and Hard Al-Cu Alloy by Overlaying Welding Process)

  • 박정식;양변모;박경재
    • Journal of Welding and Joining
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    • 제14권4호
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    • pp.53-61
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    • 1996
  • It was attempted to improve the wear resistance of Al alloy under the load condition by making a formation of the thicker surface hardening alloy layers. The thicker surface hardening alloy layers were formed on 6061 Al alloys overlayed by MIG and TIG welding process with Cu powders feeding. The characteristics of hardening and wear resistance have been investigated in relation to the microstructures of alloyed layers, with a selection of optimum alloying conditions for formation of overlaying layer. The results obtained were summarized as follows With increasing feeding rate of Cu powders by MIG welding, the hardness and specific wear of the overlay weld alloys were increased. It is considered that these high hardness and specific wear of overlay weld alloys were due to the formation of Θ($Al_2Cu$) phases. With increasing feeding rate of Cu powders by TIG welding, the hardness and specific wear of the overlay weld alloys were increased in feeding rates 12 and 18g/min. However, the hardness and specific wear were decreased in the powder feeding rate 38g/min. It is considered that considered that decrease of hardness and specific wear in the powder feeding rate 38g/min due to formation of ${\gamma}$($Al_4Cu_9$) phases.

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Steering Gear 모듈화를 위한 일체형 Rack Housing의 공정에 관한 연구[I] - 열원에 따른 SAE1020강의 용접특성 - (A Study on Processing of Monolithic Rack Housing for Modular Steering Gear[I] - The Weldability of SAE1020 Steel by Different Heat Sources -)

  • 김종도;이창제
    • Journal of Advanced Marine Engineering and Technology
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    • 제32권2호
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    • pp.306-314
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    • 2008
  • General metal welding occurs distortion. Also, reducing distortion is required much cost. Therefore, the purpose of this study is optimization of welding conditions to reduce distortion in welding of monolithic rack housing for modular steering gear. Firstly, heat source for welding was chosen arc and laser. Secondly, it investigated optimizing welding conditions in bead welding by arc and laser heat source, and welding conditions in fillet welding was optimized with welding shapes. Finally, it was measured temperature distribution of welds by infrared camera and angle distortion in fillet welding. As a result, laser welding was superior to arc welding on distortion.

복합성형공법 적용 경량 알루미늄 서브프레임 개발 (Development of Light weight Aluminum Subframe using Hybrid forming process)

  • 권태우;박병철;장계원;이우식
    • 한국소성가공학회:학술대회논문집
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    • 한국소성가공학회 2007년도 춘계학술대회 논문집
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    • pp.361-363
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    • 2007
  • The light weight aluminum subframe for automobile chassis part was developed using hybrid process, i.e. extruforming, press stamping and MIG welding. To achieve a 30 % weight reduction compared with conventional steel subframe keeping satisfactory performance, the design of cross-section of extruforming part was introduced, then forming simulation was performed and the final design was determined. In addition, we tried to estibilish optimun aluminum welding conditions for good penetration depth and few pore defact, finally the prototype of aluminum subframe was assembled using MIG welding method.

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