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The influence of Mn, Mo, Ti additions on the microstructure and magnetic properties of FeNiCr/60% WC composite coatings produced by laser cladding are investigated. The microstructure, composition and phase of FeNiCr/60% WC coatings are characterized using scanning electron microscopy (SEM), transmission electron microscone (TEM) and X-ray diffraction (XRD). The magnetic properties of the composite coatings are examined by a vibrating sample magnetometer (VSM). The results show that there's good metallurgical combination between WC-FeNiCr composite coatings and substrate, no defects on the surface such as porosity and crack. With the addition of Mn, Mo, Ti, the metallurgical reaction and microstructure is more complex, there're interaction between elements of Fe, Ni, Cr and mutual fusion diffusion with WC, generate new non-magnetic phases TiC, MoC, Fe-Cr (sigma), Cr0.19Fe0.7Ni0.11. And that with the addition of Mn, Mo, Ti, composite coating's relative permeability decreases significantly, and magnetic has strong stability. © 2015, Science Press. All right reserved.
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