<p>Fe-WC composite coatings exhibiting minimal cracking were successfully fabricated through laser cladding, employing a combination of three techniques aimed at mitigating crack formation: substrate preheating, laser remelting, and the incorporation of ultrafine WC particles. An investigation was conducted into the phase composition, microstructure, microhardness, wear resistance, and corrosion resistance of the composite coatings. The microstructure of the iron matrix within the composite coatings predominantly features planar crystals, cellular crystals, columnar crystals, columnar dendrites, and epitaxial crystals. A reaction zone is observed between the micro-WC particles and the iron matrix, with the ultrafine WC particles undergoing complete decomposition during the laser cladding process. The Fe-WC composite coatings are composed of various phases, including α-Fe, γ-Fe, WC, W₂C, Fe₂W₂C, Fe₃W₃C, Fe₆W₆C, M₂₃C₆, M₇C₃, and M₅C₂ (where M represents Cr, Fe). The microhardness of the composite coating containing 70% WC achieves a peak value of 991.7 HV0.5, which is 2.60 times greater than that of the substrate. As the WC content increases, the wear resistance of the Fe-WC composite coatings progressively improves, with the mass loss of the composite coating containing 70% WC being the lowest, at 92%, less than that of the substrate. Conversely, the corrosion resistance is found to be most robust in the composite coating with 40% WC among all the coatings analyzed.</p>