Influence of the particle size of cast tungsten carbide particles on the wear resistance of spray welding layer

       Tungsten carbide alloy material is about a hundred times stronger than the hardest steel. If any machine or mechanical device needs good wear-resistant materials, it is best to first consider using this tungsten carbide alloy material.



From the comparative analysis of different particle sizes, it can be seen that the wear resistance of the spray-welded layer increases as the particle size of the cast tungsten carbide particles decreases. The reason is that as the particle size of cast tungsten carbide particles decreases, their distribution in the spray-welded layer is improved, and the structure of the spray-welded layer becomes more uniform. On the contrary, the larger the cast tungsten carbide particles, the larger the gap between the particles, and the easier it is for the abrasive particles to invade the base metal and cause it to wear.



The cast tungsten carbide particles have a large spacing, and the scraping effect of the polygonal quartz sand on the softer matrix phase on the surface of the spray welding layer will cause serious wear of the matrix phase, and finally cause the hard phase particles to fall off due to the loss of the matrix phase. . The cast tungsten carbide particles are fine, the distance between the particles is small, and the abrasive particles are hindered by the hard phase particles, which significantly reduces the wear on the base metal. The cast tungsten carbide particles play the backbone of anti-wear during the wear process, and the shielding and protection of the softer matrix phase in turn causes the matrix to have a good holding effect relative to the cast tungsten carbide particles, so that it will not fall off. In this way, rely on each other and play their respective roles.