J. Tuominen, J. Latokartano, J. Vihinen, P. Vuoristo, T. Mäntylä, Tampere University of Technology, Tampere, Finland; T. Naumann, Fraunhofer Institute for Material and Beam Technology, Dresden, Germany; S. Scharek, L. M. Berger, S. Nowotny, Fraunhofer Institute for Material and Beam Technology (FhG-IWS), Dresden, Germany
High power diode lasers (HPDL) at a level of ³ 6 kW are efficient cladding tools in heavy engineering applications where thick (up to 5 mm) wear and corrosion resistant coating layers are required. Due to large beam geometry (20 x 5 mm2) thick and wide cladding tracks can be overlapped side by side without inter-run porosity and incomplete fusion. In this investigation the capability of HPDL cladding technique was proven in producing of thick Ni-based super alloy coatings, Stellites, tool steels and metal-matrix composites (MMC). Various coating characterization and testing methods, indentation hardness measurements, scanning electron microscopy (SEM), abrasion wear tests, residual stress and retained austenite measurements were conducted.
Summary: High power diode lasers (HPDL) at a level of 6 kW are efficient cladding tools in heavy engineering applications where thick (up to 5 mm) wear and corrosion resistant coating layers are required. Due to large beam geometry (20 x 5 mm2) thick and wide cladding tracks can be overlapped side by side without inter-run porosity and incomplete fusion.
