• ICALEO 2007 Paper #603 (Laser-Arc Welding of Duplex Stainless Steel)

    Laser-Arc Welding of Duplex Stainless Steel
    Authors:
    Ambroise Vandewynckele, Aimen; Porrino Spain
    Eva Vaamonde Couso, AIMEN; Porriño Spain
    Gabriel Quintáns Rodríguez, FACTORIAS VULCANO; VIGO Spain
    Jorge Luis Arias Otero, AIMEN; Porriño Spain
    María Peréz de Lama, FACTORIAS VULCANO; VIGO Spain
    Presented at ICALEO 2007

    Duplex stainless steels are used in shipbuilding industry to build chemical and oil tanker vessels. The use of these steels is justified to ensure good corrosion behaviour during lifetime. The main limitation of traditional welding processes when welding duplex stainless steel is that the level of distortion reached is very h...

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  • ICALEO 2007 Paper #604 (Progress in Laser-MAG Hybrid Welding of High-Strength Steels Up to 30 MM Thickness)

    Progress in Laser-MAG Hybrid Welding of High-Strength Steels Up to 30 MM Thickness
    Authors:
    Dirk Petring, Fraunhofer ILT; Aachen Germany
    Christian Fuhrmann, Copeland GmbH; Aachen Germany
    Norbert Wolf, Fraunhofer ILT; Aachen Germany
    Reinhart Poprawe, Fraunhofer ILT; Aachen Germany
    Presented at ICALEO 2007

    Within the European project HYBLAS, funded by the Research Fund for Coal and Steel (RFCS), significant progress has been achieved in laser-MAG hybrid welding of thick high-strength steel plates up to 30 mm. Results are presented in this paper. Fraunhofer ILT as leader of the HYBLAS work package Process development and production of welds, has perform...

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  • ICALEO 2007 Paper #605 (Robot Application for Laser-GMA Hybrid Welding in Shipbuilding)

    Robot Application for Laser-GMA Hybrid Welding in Shipbuilding
    Authors:
    Simon Olschok, ISF Welding and Joining Institute, RWTH Aachen University; Aachen Germany
    Uwe Reisgen, ISF - Welding and Joining Institute, RWTH Aachen University; Aachen Germany
    Ulrich Dilthey, ISF Welding and Joining Institute, RWTH Aachen University; Aachen Germany
    Presented at ICALEO 2007

    Laser hybrid welding stands for a process where laser beam and arc are acting in one common process zone. For five years now, this method has been successfully employed for V-type welds and fillet welds by the Meyerwerft -Shipyard. A new research project deals with the problems of vertical down welds a...

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  • ICALEO 2007 Paper #606 (Laser-Arc Hybrid Welding for the Cover Plate of ITER TF Coil)

    Laser-Arc Hybrid Welding for the Cover Plate of ITER TF Coil
    Authors:
    Katsunori Shiihara, Toshiba Corporation; Yokohama Japan
    Y. Makino, Toshiba Corporation; Yokohama Japan
    T. Ogawa, Toshiba Corporation; Yokohama Japan
    S. Asai, Toshiba Corporation; Yokohama Japan
    T. Kanahara, Toshiba Corporation; Yokohama Japan
    I. Senda, Toshiba Corporation; Yokohama Japan
    K. Okuno, Japan Atomic Energy Agency; Ibaraki Japan
    N. Koizumi, Japan Atomic Energy Agency; Ibaraki Japan
    K. Matsui, Japan Atomic Energy Agency; Ibaraki Japan
    Presented at ICALEO 2007

    A laser-arc hybrid welding combining the laser beam and ...

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  • ICALEO 2007 Paper #608 (Hybrid Laser Welding of Dual Phase Steel DP600: Microstructural and Mechanical Properties)

    Hybrid Laser Welding of Dual Phase Steel DP600: Microstructural and Mechanical Properties
    Authors:
    Jo Verwimp, VITO; Mol Belgium
    Eric Geerinckx, Vito; Mol Belgium
    Jan Gedopt, VITO; Mol Belgium
    Wim Van Haver, Belgian Welding Institute; Ghent Belgium
    Alfred Dhooge, Belgian Welding Institute / Faculty of Engineering, Ghent University; Ghent Belgium
    Debby Criel, Arcelor Research Industry Gent (Ocas); Zelzate Belgium
    Presented at ICALEO 2007

    The desire to combine the high productivity of laser welding with the robustness in terms of joint preparation of the GMAW process constitutes one of the main reasons for the increasing interest in...

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  • ICALEO 2007 Paper #609 (Laser Welding of a Lean Duplex Stainless Steel)

    Laser Welding of a Lean Duplex Stainless Steel
    Authors:
    Elin Westin, Outokumpu Stainless; Avesta Sweden
    Enda Keehan, Creganna medical devices; Galway Ireland
    Mats Ström, Nordic Laser Production; Mölndal Sweden
    Bernt von Brömssen, Nordic Laser Production; Mölndal Sweden
    Presented at ICALEO 2007

    Nd:YAG laser welding and laser gas tungsten arc (GTA) hybrid welding of the lean duplex stainless steel LDX 2101® (EN 1.4162, UNS S32101) were performed with and without filler wire and nitrogen additions to the shielding gas. The high energy density associated with laser welding of duplex stainless steels can affect the mechanical strength and corrosion resista...

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  • ICALEO 2007 Paper #610 (The Impact of Zinc-coating on Laser Hybrid Welding of Steel)

    The Impact of Zinc-coating on Laser Hybrid Welding of Steel
    Authors:
    Alexander Kaplan, Luleå University of Technology; Luleå Sweden
    Greger Wiklund, Luleå University of Technology; Luleå Sweden
    Tony Nilsson, SSAB Tunnplåt; Bolänge Sweden
    Presented at ICALEO 2007

    Hybrid Nd:YAG/MAG welding of ultra high strength steel is studied for 1,5 mm thick sheets in I-, T- and overlap joint type configuration. Untreated and zinc-coated steels were compared, causing distinct differences in terms of process stability and welding result. For zinc coating it can be distinguished between domains of trapped zinc layers like in overlap and T-joints and free surface zinc coatings. Wh...

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  • ICALEO 2007 Paper #701 (Collaboration of Physical and Metallurgical Viewpoints for Understanding and Process Development of Laser Welding)

    Collaboration of Physical and Metallurgical Viewpoints for Understanding and Process Development of Laser Welding
    Authors:
    Seiji Katayama, Osaka University; Ibaraki, Osaka Japan
    Presented at ICALEO 2007


    I have belonged to Prof. Matsunawas laboratory in JWRI since 1981 until his retirement from Osaka University. Prof. A. Matsunawa and I approached our experiments and researches from physical and metallurgical viewpoints in our expert fields to understand the penetration and phenomena in laser welding. The presentation will introduce our fruitful results of plume and keyhole behavior, melt flows and bubbles and pores formation in the molten pool during laser and hybrid welding. He was mos...

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  • ICALEO 2007 Paper #704 (Words of Memory to Our Colleague Prof. Akira Matsunawa)

    Words of Memory to Our Colleague Prof. Akira Matsunawa
    Authors:
    Volodymyr Kovalenko, National Technical University of Ukraine; Kyiv Ukraine
    Presented at ICALEO 2007

    I started my research at Welding Research Institute (WRI) of Osaka University, Japan in 1977 where I was working with Prof. Yoshiaki Arata (then the director of WRI) until 1978. Just that year Prof. Akira Matsunawa from Welding Department of the same university has joined the WRI. Thus I got aquainted with Akira from that time. Later we had few chances to meet and to get more familiar with each other. We were working on different projects. He had been deeply involved in studying welding process with CO2 laser and especially in under...

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  • ICALEO 2007 Paper #705 (The Contribution of Prof. Akira Matsunawa to the Understanding of Laser Welding Process)

    The Contribution of Prof. Akira Matsunawa to the Understanding of Laser Welding Process
    Authors:
    Remy Fabbro, LALP (CNRS)/GIP GERAILP; Arcueil Cedex France
    Presented at ICALEO 2007

    Among his various contributions in the domain of laser processing of materials, the laser community agrees to recognize that Prof. A Matsunawa has been a leading contributor to the understanding of the laser welding process since more than 25 years. It is interesting to note that his contribution to this field was realized in conjunction with the constant development of the ICALEO Conference during the same period, where he made his main presentations of scientific results during a continuous and regular participatio...

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