Multilayer high-speed cladding by injection of a M2 steel powder with 0.82%C, 4.7%Mo, 6.4%W, 4.1%Cr, 2.02%V, 0.3%Mn, as chemical composition, in a melted bath produced using a CO 2 continuous wave laser connected to a x-y-z coordinate table was tested in order to increase the wear resistance and heat stability of tool active surfaces made of 0.45%C steel. Layers made by different laser runs were characterized by macro and microstructure analysis, as well as a phase identification analysis by X-ray diffractometry, micro-hardening analysis and hardness testing on the coated layer surfaces in order to establish the optimal cladding condition. Lathe tools made using this technique showed a good ability to maintain their cutting power during steel shaping.

In order to increase the wear and corrosion resistance of 0.45% C surface steel layers, a multilayer coating was tested by injection of a powder with 8.9% Cr, 4.5% Fe, 5.1% B, 2.4% Al, 0.6% Cu and all remainder of Ni in the melted bath produced using a CO 2 continuous wave laser. To determine the optimal melting regime, the layers obtained by different laser conditions were characterized by macro and microstructure analysis, as well as a phase qualitative analysis by X-ray diffractometry and microhardness analysis.