ICALEO 2010 Paper #1904 (Welding with High Brilliance Lasers and Great Power Density)

Welding with High Brilliance Lasers and Great Power Density
Authors:
Andreas Patschger, University of Applied Science Jena; Jena Germany
Markus Franz, University of Applied Science Jena; Jena Germany
Jens Bliedtner, University of Applied Science Jena; Jena Germany
Jean-Pierre Bergmann, JENOPTIK Automatisierungstechnik GmbH Jena; Jena Germany
Presented at ICALEO 2010

The increasing demand on efficient and powerful lasers let the market for fiber- and disc-lasers still grow. These systems include a high brilliance and so for the ability to realize very small foki or a long focal length.
In this research phenomenological analysis were done to figure out the ...

ICALEO 2010 Paper #1903 (Effect of Heat Input Modification on Duplex Stainless Weld Quality)

Effect of Heat Input Modification on Duplex Stainless Weld Quality
Authors:
Antti Salminen, Laser processing research group, Lappeenranta University of Technology; Lappeenranta Finland
Elin Westin, Outokumpu Corporation; Avesta
Presented at ICALEO 2010

Laser welding is a perfect tool for welding of different steel grades especially stainless steel. Laser welding is often used as autogenous keyhole welding process that provides narrow deep penetration with good weld quality. New lasers offer excellent beam quality and high power via optical fiber that typically leads into improvement of welding speed. Even though increased speed increases productivity it also increases cooling rate...

ICALEO 2010 Paper #1902 (Laser Welding of Tube to Tube-Sheet Joint in Steam Generators for Nuclear Power Plants)

Laser Welding of Tube to Tube-Sheet Joint in Steam Generators for Nuclear Power Plants
Authors:
Rosa Arias, Aimen Technology Centre; PorriñO, Pontevedra Spain
Eva Vaamonde, Aimen Technology Centre; Porrino Spain
Ambroise VandewynckèLe, Aimen Technology Centre; PorriñO, Pontevedra Spain
Enrique Piñeiro, Aimen Technology Centre; PorriñO, Pontevedra Spain
Pedro Verón, Equipos Nucleares S.A.; MaliañO, Cantabria Spain
Presented at ICALEO 2010

Nowadays tube to tube-sheet joints are usually welded by TIG orbital welding process. This process is characterized by very high quality of the weld beads and good repeatability. These aspects are very ...

ICALEO 2010 Paper #1901 (Parameter Selection in Laser Welding using the Power Factor Concept)

Parameter Selection in Laser Welding using the Power Factor Concept
Authors:
Wojciech Suder, Cranfield University; Cranfield Great Britain
Stewart Williams, Cranfield University; -
Presented at ICALEO 2010

To achieve specific penetration depths in laser welding particular combinations of laser power and travel speed are required. Different combinations of power and travel speed can be used to obtain the same penetration depth. Further, for a given combination a different penetration depth occurs if a different spot size is used. Spot size is controlled by the laser properties and the optical system, and varies between laser systems. This causes difficulties in both selecting opt...

ICALEO 2010 Paper #1808 (Deep Penetration Welding with High Power Laser Under Vacuum)

Deep Penetration Welding with High Power Laser Under Vacuum
Authors:
Yohei Abe, Joining and Welding Research Institute Osaka University; Ibaraki Japan
Masami Mizutani, Joining and Welding Research Institute Osaka University; Ibaraki
Yousuke Kawahito, Joining and Welding Research Institute Osaka University; Ibaraki Japan
Seiji Katayama, Joining and Welding Research Institute Osaka University; Ibaraki Japan
Presented at ICALEO 2010

Fiber and disk lasers of high power and high beam quality have been developed. These high-power lasers are used to produce deeply penetrated welds. It is furthermore expected that sound deeper-penetration welds can be produced ...

ICALEO 2010 Paper #1807 (Laser Beam Welding in Vacuum - A Process Variation in Comparison with Electron Beam Welding)

Laser Beam Welding in Vacuum – A Process Variation in Comparison with Electron Beam Welding
Authors:
Uwe Reisgen, Rwth Aachen University - Welding and Joining Institute (Isf); Aachen Germany
Simon Olschok, Rwth Aachen University - Welding and Joining Institute (Isf); Aachen Germany
Stefan Longerich, Rwth Aachen University - Welding and Joining Institute (Isf); Aachen Germany
Presented at ICALEO 2010

Laser beam welding (LBW) and electron beam welding (EBW) are well-established methods for industrial application. Although being in competition to one another every so often, their process-specific properties allow the processes to cover their own application fields. For...

ICALEO 2010 Paper #1805 (Properties of Welded Joint for Narrow Gap Laser Welding of Austenitic Stainless Steels)

Properties of Welded Joint for Narrow Gap Laser Welding of Austenitic Stainless Steels
Authors:
Xudong Zhang, Materials Research Laboratory, Hitachi Ltd.; Hitachi, Ibaraki Japan
Eiji Ashida, Materials Research Laboratory, Hitachi, Ltd.; Hitachi, Ibaraki Japan
Shoh Tarasawa, Hitachi-Ge Nuclear Energy, Ltd.; Hitachi, Ibaraki Japan
Presented at ICALEO 2010

Thick-section austenitic stainless steels are widely used in components and structures for nuclear power plant. Laser welding is being considered as a high-efficiency method to instead of arc welding for some components, in order to improve production efficiency and reduce residual stresses of the heat-affected zone. In...

ICALEO 2010 Paper #1804 (New Advanced Energy Efficient Cooling Solutions for Lasers)

New Advanced Energy Efficient Cooling Solutions for Lasers
Authors:
Wolfgang Todt, RIEDEL USA; Westland MI USA
Presented at ICALEO 2010

The presentation covers the intelligent use of state of the art technology to reduce the energy consumption of chillers to efficiently cool lasers as well as reduce CO2 emissions without increasing the cost of the chiller.
The overview gives also easy to understand examples for the audience without getting to technical.
It summarizes the gains and savings in real dollars.

ICALEO 2010 Paper #1803 (Prevention of Porosity in Deep Partial Penetration Laser and Hybrid Welding with Minimum Solute Oxygen in the Weld Metal)

Prevention of Porosity in Deep Partial Penetration Laser and Hybrid Welding with Minimum Solute Oxygen in the Weld Metal
Authors:
Susumu Tsukamoto, National Institute for Materials Science; Tsukuba, Ibaraki Japan
Lin Zhao, National Institute for Materials Science; Tsukuba, Ibaraki Japan
Goro Arakane, National Institute for Materials Science; Tsukuba, Ibaraki Japan
Tomohiro Sugino, IHI Corp.; Yokohama Japan
Koichi Yasuda, Jfe Steel Corp.; Chiba Japan
Presented at ICALEO 2010

Formation of some weld defects is one of the serious problems in laser and laser/arc hybrid welding of heavy section steel plates. Especially in the partial penetration we...

ICALEO 2010 Paper #1709 (Laser-Based Production of Thin Wear-Protection Films)

Laser-Based Production of Thin Wear-Protection Films
Authors:
Dominik Hawelka, Fraunhofer ILT; Aachen Germany
Presented at ICALEO 2010

Wear protection coatings are widely applied in the automotive industry to improve tribo-mechanical properties of highly stressed engine components. Today these coatings are produced by physical vapor deposition (PVD) which is a very time consuming production-step. In contrast, sol-gel coating processes have a high potential to be an energy- and resource-efficient technique to produce functional coatings as they do not need expensive vacuum technology or any other elaborate equipment. The major challenge of this process is to adapt a thermal post treatment to tur...