Tungsten carbide welding wire for tungsten carbide hard phase, the oxygen - acetylene flame surfacing welding, high impact resistance, corrosion resistance and abrasion resistance,can be in medium carbon steel, low carbon steel, low alloy steel, stainless steel, grey cast iron and the ball mill cast iron welding,suitable for oil drilling tools (e.g., PDC bit, centralizer) construction, building materials machinery (such as in the production of brick and concrete mixed cage, blade, etc.) address tools in mines, agriculture, food and chemical industry machinery, strong wear corrosion of the overlaying welding, repair, can obviously reduce the tool wear and tear, improve work efficiency.