• Title/Summary/Keyword: Laser Hybrid MIG Welding

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Microstructure Evolution of UFG Steel Weld by Hybrid and Laser Welding (하이브리드 용접과 레이저 용접에 의한 세립강 용접부의 미세조직변화에 관한 연구)

  • Dong, H.W.;Lee, M.Y.;Ahn, Y.S.
    • Journal of Power System Engineering
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    • v.14 no.3
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    • pp.58-63
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    • 2010
  • A laser beam welding and an electric arc welding were combined, and the positive points of each welding method are drawn such as high speed, low thermal load, deep penetration, and high productivity. The fiber laser-MIG conjugated welding. namely the hybrid welding has been studied mainly for the automation industry of a pipeline welding. In this study, the MIG welding was combined with a fiber laser welding to make up the hybrid welding. The weld shapes, microstructures and mechanical properties for weld zones after the hybrid welding or only fiber laser welding were investigated on the 700 MPa grade Ultra Fine Grained(UFG) high strength steel. The amount of acicular ferrite in weld metals and HAZ(heat affected zone) was observed larger after hybrid welding compared with after only laser welding. The Vickers hardness of the top area of the fusion zone after fiber laser welding was higher compared with after hybrid welding.

Effects of laser and arc power on the penetration depth in $CO_2$ laser-MIG hybrid welding ($CO_2$ 레이저-MIG 하이브리드 용접부 용입깊이에 미치는 레이저 및 아크 출력의 영향)

  • 홍승갑;이종봉
    • Proceedings of the KWS Conference
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    • 2003.05a
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    • pp.81-83
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    • 2003
  • The potential advantages of the hybrid welding process are improved weld penetration, enhanced gap tolerance, control of weld metal composition, and improved weld quality in comparison to laser or arc welding. Especially, the deep penetration of hybrid welding is very attractive in welding of thick plates. In this study, therefore, the influence of arc power in hybrid welding on detailed bead dimensions at different laser power levels was investigated.

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The Comparison of the Thermal and Mechanical Characteristic in Butt Joint for Ship Structure Thick Plate AH32 Steel by SAW & Hybrid(CO2 Laser+MIG)Welding (조선용 후판 AH32 강에 대한 SAW 및 Hybrid(CO2 Laser+MIG) 맞대기 용접부의 열 및 역학적 특성 비교)

  • Bang, Han-Sur;Oh, Chong-In;Bang, Hee-Seon;Ro, Chan-Seung;Lee, Yoon-Ki;Bong, Hyun-Soo;Lee, Jeong-Soo
    • Journal of Welding and Joining
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    • v.26 no.5
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    • pp.29-35
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    • 2008
  • In this paper concentrate on the comparison of the thermal and mechanical characteristics in Butt joint of ship structure AH32 steel by using hybrid welding and conventional SAW. For this purpose, fundamental welding phenomena of hybrid process using $CO_2$ Laser and MIG is investigated by the experiments and characteristics of thermal and welding residual stress distribution of welded joint in SAW and hybrid welding are understood from the result of FE numerical simulation and experimental values. From the result of this study, it is understood that Laser-MIG hybrid welding have high potential, make substantial saving of time and manufacturing cost and may proves its self robust in the butt joining of thick AH32 steel ship structural plate in the near future.

Study on Weldability of A5052-H32 Sheet using Nd : YAG Laser-MIG Hybrid Welding (하이브리드(CW Nd : YAG Laser + MIG) 용접을 이용한 A5052-H32 맞대기 용접부의 역학적 특성에 관한 연구)

  • Kim, Jun-Hyung;Bang, Han-Sur;Bijoy, M.S.;Jeon, Geun-Hong;You, Jea-Sun;Bang, Hee-Seon
    • Journal of Ocean Engineering and Technology
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    • v.24 no.6
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    • pp.92-96
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    • 2010
  • Recently, the application of aluminum alloys has been increasing for lightweight and high quality transport vehicles. Therefore, the proposal has been made to apply high speed hybrid welding methods to the marine grade aluminum alloy (A5052) used for shipbuilding by combining a 3-KW CW Nd : YAG laser and the MIG welding process. In this study, the characteristics of the welding parameters were investigated for a hybrid butt joint. This paper also describes the determination of the heat distribution in a weldment and the welding residual stress using a finite element method. Mechanical experimentation was also used to ascertain the reliability of the weldment.

A Study on the Weldability for fillet joint of light weight alloy 5mm Al 5083 using Hybrid(CW Nd:YAG Laser+MIG) Welding

  • Park, Ho-Kyoung;Bang, Hee-Seon;Rajesh, S.R.;Oh, Chong-In;Bang, Han-Sur
    • Proceedings of the KWS Conference
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    • 2006.10a
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    • pp.216-218
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    • 2006
  • The application of aluminium alloy is increasing for lightweight and high quality transport vehicle. In this study, therefore, it is intended to apply the high speed hybrid welding method for marine grade aluminium alloy(A5083) used for shipbuilding that consists of 3 kW CW Nd:YAG laser and MIG welding process. For this purpose, the characteristics of process parameters(laser & arc combine angle and focal position of hybrid head to specimen) are investigated for hybrid fillet joint. This study also describes determination of heat distribution using finite element model of the T-joint fillet weld using the in-house solver which has been validated for different type of welding problems.

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DEVELOPMENT OF THE JOINING PROCESSES IN A GLOBAL PERSPECTIVE

  • Pekari, Bertil
    • Proceedings of the KWS Conference
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    • 2002.10a
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    • pp.1-14
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    • 2002
  • There is a continuous development of the most common welding processes like MMA, MIG/MAG, PAW and SAW. At the same time there is a conversion from stick electrodes to solid and cored wires with an increased productivity as a result. In parallel with these changes new processes are introduced and implemented. The number of Friction Stir Welding installations is starting to grow fast Hybrid laser welding has probably made a technical break through. The Magnetic Pulse Welding process is taking off. The different mechanical joining methods; clinching and self-piercing riveting; must not be forgotten. Structural adhesive is another method to consider.

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