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- W2359876693 abstract "CO2 laser was adopted to prepare nickel based nanometer WC/Co composite clad coating on the surface of 45 steel. Laser overlapping was used on the base of laser single cladding. The microstructure, phase, composition and hardness in the single and overlap clad coatings were analyzed by SEM, XRD, EDS and microhardness test. The results indicate that Ni based nanometer WC/Co composite coating metallurgically bonded with the base and eliminated with cracks and pores can be prepared on the surface of 45 steel by selecting appropriate laser single and overlap cladding technology. The microhardness of the laser single and overlap clad coatings are 779.3～1315.0 HV0.1 and 600.3～1560.0HV0.1. In the laser single and overlap coatings, though the kinds of carbides are not changed, the shape and distribution of carbides are different remarkably. The shape and distribution variety in laser overlap clad coating are more obvious than that in laser single clad coating. There is a considerable quantity of nanometer particles visible with granularity small than 100 nm both in the laser single clad and overlap clad composite coatings. Through analysis the nanometer particles, most of them may be carbides of WC and W2C. The nanometer WC/Co particles introduced into the composite coatings play an important nanometer-effect role in resisting crack of the laser cladding processes. The research results have an important exploration significance in laser engineering applications to improve and refurbish large surface area on important parts." @default.
- W2359876693 created "2016-06-24" @default.
- W2359876693 creator A5029111076 @default.
- W2359876693 date "2008-01-01" @default.
- W2359876693 modified "2023-09-23" @default.
- W2359876693 title "Microstructure of nickel based nanometer WC/Co composite coating prepared by laser overlap cladding" @default.
- W2359876693 hasPublicationYear "2008" @default.
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