<p>A wear-resistant surface layer was successfully fabricated on a pure aluminum substrate by pre-coating with CuZn-WC mixed powder and subsequent TIG arc overlay welding. The microstructure of the surface layers, formed under various alloy proportions, was analyzed using SEM, EDX, and XRD. These analyses confirmed a robust metallurgical bonding between the surface layer and the pure aluminum substrate. The predominant phases in the surface layer include an α-Al solid solution, a substantial amount of platy or blocky Al₄W compounds, and a small amount of agglomerated CuZn alloy and WC. Both hardness and wear resistance of the surface layer improved significantly. When the WC content in the pre-coating powder was greater than or equal to 60wt.%, the microhardness and wear resistance of the surface layer were notably enhanced, reaching up to 4.5 times the hardness of the substrate and approximately twice its wear resistance.</p>