14 January 2008 Morphology and mechanical characteristics of pulse laser coating-texturing WC-Ni alloying layers
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Abstract
A novel laser coating-texturing (LCT) technique was proposed to achieve appropriate surface topographies and frictional behaviour. The LCT process was realized by applying laser pulses at very high repetition rates to produce innumerable micro-craters with the required shape profile on the surface of the workpiece. Moreover, surface alloying of the dimples was carried out by melting submicron WC-Ni alloy powder on the substrates. Morphology and microstructures of the texturing layers were characterized using optical microscopy (OM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). Mechanical properties of the textured samples were evaluated by abrasive resistance tests and microhardness measurement. Experimental results show that good fusion bonding between the texturing layers and the substrate has been formed, and the texturing layers is mainly composed of dense and hard fine-grained structures. The abrasive wear resistance of the laser coating textured surface was 5 times higher than that of the substrates. The average surface microhardness values were as high as 850HV.
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Daping Wan, Daping Wan, Hongbin Liu, Hongbin Liu, Dejin Hu, Dejin Hu, Lanrong Cai, Lanrong Cai, } "Morphology and mechanical characteristics of pulse laser coating-texturing WC-Ni alloying layers", Proc. SPIE 6825, Lasers in Material Processing and Manufacturing III, 682506 (14 January 2008); doi: 10.1117/12.757846; https://doi.org/10.1117/12.757846
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