Thermal imaging of laser powder interaction zone in Ultra-High Speed Laser Cladding process

Abstract

Laser cladding process is a coating deposition technology, where the layer of additional material is cladded due to interaction of powder particles with laser heat source and melt pool. The monitoring of interaction between laser beam and powder became more vital in specific Ultra-High Speed Laser Cladding process, since the cladding speed requires particles to be melted before reaching the substrate. Therefore, this paper presents the preliminary study of lateral measurement of powder concentration under the cladding nozzle and its temperature distribution during the process. Moreover, the evaluation of used spectral bands for observation of laser-powder interaction was carried out.