Abstract
Copper coatings deposited by a high power laser cladding on pure iron were introduced in this paper. Laser induced surface structures were observed. The effect of laser power on microhardness of laser cladding copper layer and the substrate was investigated using Vickers microhardness tester. The well distributed copper cladding with higher microhardness was obtained at a power of 2·8 kW. Energy dispersion spectroscopy analysis showed that more iron atoms diffused into the copper cladding when the laser power was 2·8 kW, and the increased microhardness of the copper cladding was due to solid solution strengthened by iron atoms and the rapid solidification followed the laser treatment.
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