Laser cladding is an effective material processing that produces a surface [ayer having good wear and corrosion properties with minimized dilution.In the present work, Co based hardfacing alloy claddings by the blown powderprocess and N i-Cr-Al-Y alloy claddings by the preplaced powderprocess were performed.Formation behavior of the laser clad layers and their properties were investigated, Low dilution in the laser cladding process using powder materials was attributed to low melting efficiency for substrate melt due to indirect heat transfer via melting clad layer.For wear properties, carbide reinforcing improved wear resistance of the Co based hardfacing alloy claddings.Superior oxidation resistance was obtained in the Ni-Cr-Al-Y claddings.Chromium carbide reinforcing improved wear resistance of the Ni-Cr-Al-Y alloy c]adding with a little sacrifice of oxidation resistance.
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Hirose et al. (1995) studied this question.
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