Verdichten von thermisch gespritzten Schichten mit C02-Laserstrahlung

CO2 laser radiation has been employed for remelting of thermally sprayed layers on steel surfaces. The remelting was performed as a function of processing parameters with different power densities and dwell times resulting in variable heating and cooling rates. The remelting yields surface layers of high densification and better adherence with negligable heat distortion of the substrate. Porosity, cracking and wear resistance of the surface layer are improved by optimizing the processing parameters. (ILT)