Possibilities and Limitations of Laser Surface Alloying by Melting of Predeposited Layers

Pelletier, J.M.; Issa, Assim A.; Fouquet, F.

doi:10.1051/jp4:1991719

Cited by 1 publication

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“…However, owing to high reflectivity to infra-red wavelength and thermal conductivity, laser treatment of brass presents a certain degree of difficulty. This leads to that the studies on the laser surface modification of copper and copper alloys are much less common than the studies on other engineering alloys [1][2][3][4].In present researches, laser cladding with pre-coating was chosen as a feasible method to overcome the absorption problem. Yet pre-coating might produce pores and high dilution rate during laser surface cladding.…”

Section: Introductionmentioning

confidence: 99%

High Power Diode Laser Clad Cu-WC-Ni Composite Coatings on Brass for Wear Resistance Enhancement

Yan

Wang

2013

AMR

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To improve the wear resistance of brass substrate while retaining the electrical conductivity, laser cladding was applied to Cu-WC-Ni composite coating on brass using High Power Diode Laser. Microstructures, phase constitution and wear properties are investigated by means of scanning electronic microscopy with energy disperse spectroscopy and X-ray diffraction, as well as microhardness test and speed friction and wear test. The result shows that microhardness and wear resistance of clad coating were improved obviously compared with the brass substrate owing to the addition of WC ceramic phase, when the content of WC is 25%, the hardness of coating is 4 times of substrate, as well the cumulation mass loss is 1/19 of substrate. Electrical conductivity did not change as copper powder had high electrical conductivity.

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Section: Introductionmentioning

confidence: 99%