D. T. Levcovici, S.C. UZINSIDER ENGINEERING S.A., Galatzi, Romania
Multilayer cladding by injection of high-speed 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 melted bath by CO2 continuous wave laser connected to x-y-z coordinate table was tested in order to increase the wear resistance and heat proving of tool active surfaces made of 0.45%C steel. Layers made by different laser running were characterized by macro and microstructure analysis, as well as phase quality analysis by X ray diffractometry, microhardening analysis and hardness finding on coated layer surface in order to establish the optimal cladding run.
Lathe tools made by this procedure showed a good behavior when steel shaping. Turning test pointed out the fact that laser processed tools had a higher behavior, determined by one hand of higher superficial hardness and by the other hand of larger steel carbon body capacity to spread the heat from the active area.
Summary: Multilayer cladding by injection of high-speed 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 melted bath by CO2 continuous wave laser connected to x-y-z coordinate table was tested in order to increase the wear resistance and heat proving of tool active surfaces made of 0.45%C steel. Lathe tools made by this procedure showed a good behavior when steel shaping.
