Product Code: ICAL07_1702

Hot-wire Cladding Process Studies
Authors:
Janne Nurminen, Technology Centre Ketek Oy; Kokkola Finland
Jouko Riihimaki, Technology Centre Ketek Oy; Kokkola Finland
Jonne Nakki, Technology Centre Ketek Oy; Kokkola Finland
Petri Vuoristo, Technology Centre Ketek Oy, Tampere University of Technology; Kokkola Finland
Presented at ICALEO 2007

Hot-wire laser cladding is a coating method with excellent properties and high deposition rate. Process is rather simple and fundamental relationships of basic parameters like laser power, amperage, voltage, travel speed and spot sizehave been studied experimentally. Solid wires are easily melted by the melt pool generated by laser beam, but there are some difficulties concerning cored wires. With solid wires the coatings are very homogeneous but hot-wire cladding with cored wires can lead to inhomogeneous structure. Methods to improve cored wire coating structures are adjustments of the wire feed direction, wire tip placement, wire stick out and hybrid cladding method. Connection of process parameters and cladding results are presented.