In many cases, the finished workpiece needs to be coated. The coating provides lubricity and increased hardness, as well as providing a barrier to the substrate to prevent oxidation when exposed to high temperatures. Carbide substrates are critical to the performance of the coating. In addition to customizing the main properties of the matrix powder, the surface properties of the substrate can be customized by chemical selection and by changing the sintering method. Through the migration of cobalt, in the blade surface of the outermost layer of 20-30μm thickness enrichment relative to the rest of the workpiece more cobalt, which gives the substrate surface better toughness, it has a strong resistance to deformation.