2019-09-20 14:35:59

Relation between Particle Size of Tungsten Carbide Alloy Powder and Wear Resistance of Spray Welding Layer

The hardness of tungsten carbide alloy is generally 2000-3000HV, and the hardness of alloy steel is about HV800. Therefore, it can be seen that the wear resistance of tungsten carbide alloy is better than that of ordinary alloy. When wear is difficult to solve, tungsten carbide alloy is an alternative for our technicians. But tungsten carbide alloy is difficult to form, so tungsten carbide is generally used. Powder spray welding surface treatment can still achieve good wear resistance. In our Technical Selection Manual, there is a plan that if any machine or mechanical device needs good wear-resistant materials, it is better to consider using tungsten carbide alloy materials first.


Next, we introduce the comparative analysis of the wear resistance of tungsten carbide powder particles with different particle sizes. The wear resistance of spray welding layer increases with the decrease of the particle size of tungsten carbide casting. The reason is that as the particle size of cast tungsten carbide decreases, its distribution in spray welding layer is improved, and the structure of spray welding layer becomes more uniform. On the contrary, the larger the casting tungsten carbide particles are, the larger the gap between them is, and the easier the abrasive particles penetrate into the matrix metal and wear it. The spacing of cast tungsten carbide particles is large, and the scraping effect of polygonal quartz sand on the softer matrix phase on the surface of spray welding layer will cause serious wear of the matrix phase, and finally the hard phase particles will fall off because of losing the maintenance of the matrix phase. The cast tungsten carbide particles are fine and the distance between particles is small. The abrasive particles are hindered by hard phase particles and the wear of matrix metal is obviously reduced.


Cast tungsten carbide particles play a key role in anti-wear during wear process, and the shielding and protection of softer matrix phase in turn leads to a good holding effect of matrix on cast tungsten carbide powder, so that it does not fall off. In this way, they depend on each other and play their respective roles.

Langsun Carbide has all kinds of shapes and sizes of cemented carbide products including carbide rods, carbide plates, carbide rings, carbide bushings, carbide nozzles, carbide balls, valves and nonstandard carbide parts. We feel very pride that our tungsten carbide products are widely used in the following fields, Mechanical seals, oil and natural gas industry, New Energy, Military industry, Aerospace, Auto parts industry, Steel smelting, Coal mining, Chemical industry. More detail: www.ls-carbide.com