• ICALEO 2006 Paper #1001 (Laser Cladding of Cu-NbC Nanocomposite Coatings)

    Laser Cladding of Cu-NbC Nanocomposite Coatings
    Authors:
    Amelia Almeida, Instituto Superior Tecnico; Lisboa Portugal
    Sonia Eugenio, Instituto Superior Tecnico; Lisboa Portugal
    Teresa Marques, INETI-DMTP; Lisboa Portugal
    Vanessa Livramento, INETI-DMTP; Lisboa Portugal
    Jose Brito Correia, INETI-DMTP; Lisboa Portugal
    Rui Vilar, Instituto Superior Tecnico; Lisboa Portugal
    Presented at ICALEO 2006

    Cu-matrix composites are interesting materials to be used as coatings in applications where efficient heat transfer and good wear resistance are simultaneously necessary, like mould repair, electric sliding contacts, high temperature seals, e...

    $28.00

  • ICALEO 2006 Paper #1002 (Laser Cladding of Multiple Track Composite Nicrbsi Coatings)

    Laser Cladding of Multiple Track Composite Nicrbsi Coatings
    Authors:
    Armando Yanez, Universidade da Coruna; Ferrol Spain
    Jose Carlos Alvarez, Universidade da Coruña; Ferrol Spain
    Jose Manuel Amado, Universidade da Coruña; Ferrol Spain
    Maria Tobar, Universidade da Coruña; Ferrol Spain
    Presented at ICALEO 2006

    NiCrBSi coatings are employed to improve the quality of components submitted to high temperature wear and corrosion. Boron and silicon on its composition lowers the melting point and gives them its self-fluxing character. Hard ceramic particles like tungsten carbides (WC) can be added to increase hardness and abrasive wear resistance of the Ni alloy...

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  • ICALEO 2006 Paper #1003 (Laser Cladding in Practice of Valuable Products; the Experience of a Laser Cladding Job Shop)

    Laser Cladding in Practice of Valuable Products; the Experience of a Laser Cladding Job Shop
    Authors:
    Willem Husslage, NedClad Technology BV; Hengelo Netherlands
    Presented at ICALEO 2006

    NedClad Technology BV is a small highly specialised laser clad firm. As a spin off of Twente University (NL) applies corrosion, wear and heat resistant coatings using a 2 kW Nd:YAG-laser and a 9-axis robot based manipulation system. The laser clad layers are applied on both new products and on worn and damaged products, resulting in better products than the originals. The main fields of interest are the process industry, off shore applications, combustion engine parts, energy generating equipment; besides ther...

    $28.00

  • ICALEO 2006 Paper #1005 (Improving Laser Cladding Process Conditions by Inducing Skin Effect through High Frequency Magnetic Field)

    Improving Laser Cladding Process Conditions by Inducing Skin Effect through High Frequency Magnetic Field
    Authors:
    Jean Pierre Bergmann, TU Ilmenau; Ilmenau Germany
    Johannes Wilden, TU Ilmenau; Ilmenau Germany
    Markus Dolles, TU Ilmenau; Ilmenau Germany
    Presented at ICALEO 2006

    Laser beam cladding represents a technology, which allows high quality coating technique towards other thermal coating processes as for example a good metallic bonding between coating and base material, a fine microstructure and good mechanical properties due to the rapid cooling are reached. Moreover the very small dilution allows ensuring the desired metallurgic properties in for example a one ...

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  • ICALEO 2006 Paper #1006 (Comparison of Laser Cladding with Powder and Hot and Cold Wire Techniques)

    Comparison of Laser Cladding with Powder and Hot and Cold Wire Techniques
    Authors:
    Janne Nurminen, KETEK; Kokkola Finland
    Jouko Riihimäki, Central Ostrobothnian Technology Centre KETEK; Finland
    Jonne Näkki, Central Ostrobothnian Technology Centre KETEK; Finland
    Petri Vuoristo, KETEK; Finland
    Presented at ICALEO 2006

    Laser cladding with various methods have been utilized for some years with increasing quantity. Powder has been traditional type of consumable, but some usage of wires has been used as well. There are also a number of cladding reports with preheated wire deposition. The aim has been to increase the low productivity of laser cladding. Th...

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  • ICALEO 2006 Paper #101 (Analysis of Basic Processes inside the Keyhole during Deep Penetration Nd-Yag CW Laser Welding)

    Analysis of Basic Processes inside the Keyhole during Deep Penetration Nd-Yag CW Laser Welding
    Authors:
    Remy Fabbro, LALP (CNRS)/GIP GERAILP; Arcueil Cedex France
    Sonia Slimani, Air Liquide-CTAS; St OUEN L'AUMNE France
    Frederic Coste, LALP (CNRS)/GIP GERAILP; ARCUEIUL France
    Francis BRIAND, Air Liquide-CTAS; St OUEN L'AUMNE France
    Presented at ICALEO 2006

    The keyhole geometry in deep penetration laser welding results of the combination of several complex processes and their relative importance is not really established today. Firstly, we will report several results concerning the geometry of the keyhole where its inclination has been determined as a fu...

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  • ICALEO 2006 Paper #102 (Holographic Diffractive Optical Elements Allow Improvements in Conduction Laser Welding of Steels)

    Holographic Diffractive Optical Elements Allow Improvements in Conduction Laser Welding of Steels
    Authors:
    James Kell, Loughborough University; Loughborough, Leics Great Britain
    John Tyrer, Loughborough University; Loughborough, Leics Great Britain
    Rachel Thomson, Loughborough University; Loughborough, Leics Great Britain
    Rebecca Higginson, Loughborough University; Loughborough, Leics Great Britain
    Presented at ICALEO 2006

    Computer generated holographic elements have been successfully used as a novel beam delivery method in conduction limited laser welding a range of steels using a 1.2kW CO2 laser. An ideal weld zone profile was thermally modelled to pro...

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  • ICALEO 2006 Paper #103 (The Effect of Welding Parameters on Keyhole Behavior in CO2-Laser Welding)

    The Effect of Welding Parameters on Keyhole Behavior in CO2-Laser Welding
    Authors:
    Antti Salminen, Lappeenranta University of Technology; Lappeenranta Finland
    Anna Fellman, Lappeenranta University of Technology, Laser processing laboratory; Lappeenranta Finland
    Presented at ICALEO 2006

    The advantages of laser welding are based on the utilization of so called keyhole, which is a vapor channel generated to base material. The energy of laser beam is brought to the material via the keyhole. There are various mathematical models created explaining the shape and behavior of keyhole during welding. However, the validation of the keyhole behavior against the models is lacking. It is common...

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  • ICALEO 2006 Paper #104 (Effect of Alloying Elements on Porosity Formation in Laser Welding of Heavy Section Steel Plates)

    Effect of Alloying Elements on Porosity Formation in Laser Welding of Heavy Section Steel Plates
    Authors:
    Susumu Tsukamoto, National Institute for Materials Science; Tsukuba, Ibaraki Japan
    Goro Arakane, National Institute for Materials Science; Tsukuba, Ibaraki Japan
    Kazuhiro Kojima, Nippon Steel; Futtsu, Chiba Japan
    Tadayuki Otani, Nippon Steel; Futtsu, Chiba Japan
    Shigeru Ohkita, Nippon Steel; Futtsu, Chiba Japan
    Presented at ICALEO 2006

    Effect of some alloying elements on the porosity formation has been investigated in full penetration laser welding of 12 mm thickness C-Si-Mn steels using a 20 kW CO2 laser. Formation process of the porosit...

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  • ICALEO 2006 Paper #105 (Avoiding Hot Cracking by Induction Based Change of Thermal Strains during Laser Welding)

    Avoiding Hot Cracking by Induction Based Change of Thermal Strains during Laser Welding
    Authors:
    Berndt Brenner, Fraunhofer IWS Dresden; Dresden Germany
    Gunther Goebel, Fraunhofer IWS Dresden; Dresden Germany
    Presented at ICALEO 2006

    Hot cracking in welding is still an unresolved problem for a wide range of materials. Restricting the chemical composition usually helps to reduce this problem, e.g. limiting the sulphur content on steels to very low levels. But for industrial applications such additional restrictions on the material norm are hardly applicable. Furthermore some steels grades like free cutting steels contain additional sulphur which counteracts this approach. Therefore ...

    $28.00

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