Research of laser remelting of jet electrodeposited nanocrystalline nickel coating

In order to study the effect of laser remelting on the property of the nanocrystalline nickel coating prepared by jet electrodepositing on the substrate of 45# carbon steel,the coatings' surface morphology and the size of crystal were analyzed with scanning electron microscope and X-ray diffractometry,the microhardness and corrosion resistance of coatings were also tested,and the effect of laser remelting were discussed in theory and experiment.The results showed that the average size of crystal of jet electrodeposited nickel coating was 13.7nm under the optimum processing parameters.After laser remelting,the size of crystal of coating was greatly diminished,the bonding state between the coating and substrate becomes from mechanical combination to metallurgical combination,and the coating's microhardness,the corrosion resistance were obviously increased.This result has certain theory and practical significance in promoting laser processing technique in the application of nano-materials.