Laser beam cladding is a versatile method for the deposition of functional surface layers, the generation of prototypes, and the repair welding of components. It is a thermal process characterized by a highly localized energy input. Powder-fed laser cladding is typically done with a CO 2 , Nd:YAG, or diode laser scanned at a speed of 0.3 to 1.5 m/min. The present work investigates the extent to which deposition speed and thermal efficiency can be increased. Using a Nd:YAG laser and high scan rates, functional layers a few tenths of a mm thick are obtained and larger surface areas are processed per unit of time. Paper text in German.

Titanium aluminide shows good potential for lightweight applications at high temperatures, provided various problems are overcome. The primary problem, low-temperature brittleness, can be resolved through a combination of laser cladding and directional solidification. This paper explains how Ti48Al2Cr alloy is applied and how process parameters must be chosen so that directional solidification occurs. This involves the use of FEM simulations, carried out in parallel with experimental work, to determine temperature gradients and cooling rates at the solidification front and in the melt pool and their effect on solidification structures. Paper text in German.

BIAS Bremen and SLV Rostock have received approval from the classification society "Germanischer Lloyd" for the novel manufacture and replacement of certain engine components with the powder-fed laser-beam plating process. This paper discusses the development of a procedure based on theoretical and experimental examinations on comparable test components. It is observed that, using this simulation tool, a reliable forecast of material conditions, which consequently emerge from the thermal cycle during laser surface treatment is possible. Paper includes a German-language abstract.