Product Code: ICA13_2006

The Effect of Minor Alloying Elements of Alloy 625 on the Laser Cladding Process
Authors:
Jonne Nakki, Tampere University of Technology; Kokkola Finland
Henri Pajukoski, Tampere University of Technology; Tampere Finland
Jari Tuominen, Tampere University of Technology; Tampere Finland
Petri Vuoristo, Tampere University of Technology; Tampere Finland
Presented at ICALEO 2013

Hot cracking sensitivity of some commercially available alloy 625 powders in laser cladding has been studied. Based on the previous studies on total of 11 powders from different manufacturers, some follow-up tests with powders that had varying amounts of additional alloying or impurity elements boron, silicon, aluminium and titanium were concluded. Results show that the hot cracking tendency was increased when small amount of boron was added while the addition of aluminium and titanium seemed to cure the hot cracking tendency. Also the effect of elements boron, silicon, aluminium and titanium on the microstructure, hardness, dilution and bead shape were examined.