Laser Deposition Welding for the Fabrication of Internal Contours
Khudaverdi Karimov, Andreas Weisheit und Konrad Wissenbach, Aachen
ABSTRACT For the fabrication of internal contours having a diameter below 300 mm special optics have to applied, if the laser deposition welding is used. In the optical devices presented in this contribution the beam guiding components, i. e. lenses and mirrors, as well as the components for media transportation, i. e. powder, gas and cooling water, have been integrated into a compact housing of 45 mm in diameter. Thus, internal contour with a diameter of 50 mm can be manufactured. The maximum depth is 500 mm. The optical devices are operated by a coupled Nd:YAG-Laser and have been tested for a power of up to 3 kW. One optical device has been provided with a conduction for the transport media in a way that also excentic holes can be manufactured. Typical dimensions of the layer which can be realised are 1 to 3 mm in width and range between 0.4 to 1 mm in depth. Up to the present Iron, Aluminium, Nickel and Cobalt base alloys have been applied. For practical application demonstration a cylinder for a racing motor byce has been provided with a wear resistant layer. Further application ranges are particularly repair of founding tools and turbine components.
Publication Source: Materialprüfung, ISSN: 0025-5300
Issue: 2004-5, pp -
Publisher: Carl Hanser Verlag München
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