Abstract

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. The powder-fed laser beam cladding process uses CO2- and, more recently, Nd:YAG- and direct diode lasers at a typical processing speed within 0.3 and 1.5 m/min. The present work investigates the extension of process parameters towards significantly higher speed and thermal efficiency. In this study, a focused Nd:YAG laser beam was used, which produces a small melt pool. Furthermore high processing speed leads to interaction times in the range of milliseconds. With minimal overall heat input, functional layers with a thickness of tenths of millimeters are obtained and the surface area processed per time unit is increased. Paper text in German.

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