| Deposition of Thick Wear and Corrosion Resistant Coatings by High Power Diode Laser | ||
| Mr. Jari Tuominen1, Jyrki Latokartano1, Jorma Vihinen1, Petri Vuoristo1, Tapio Mäntylä1, Tobias Naumann2, Siegfried Scharek2, Lutz-Michael Berger2 and Steffen Nowotny2, 1Material Science/Laser Application Laboratory, Tampere University of Technology, Korkeakoulunkatu 6, Tampere, 33720, Finland, 2Fraunhofer Institute for Material and Beam Technology (FhG-IWS), Winterbergstrasse 28, Dresden, D-01277, 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. | ||