Tungsten Carbide Nozzle Ceramic Nozzle Comparison

In the early days, the major material for nozzle is iron, but it has low hardness, poor performance in wear and corrosion resistance and the service life is relatively short. Except the iron, hardened steel and stainless steel are also two kinds of more common metal nozzle materials. They have simple manufacturing process, low cost, which is suitable for some cleaning work, except the large-scale operations. Until the late 1930s, with the abrasive jet technology and the rapid development of materials science and technology to the production of carbide lined nozzles was only developed.

Compared with iron nozzle, tungsten carbide nozzle has more complex manufacturing process, higher cost, but it has remarkable improvements in the hardness, the strength, the wear and corrosion resistance and the service life. Especially in erosion rate, tungsten carbide has better performance in the erosion resistance. But due to the high hardness, low toughness, brittle, difficult to be fabricated, which is not suitable for the manufacture of nozzle with complex structure. In practical, tungsten carbide usually to be machined into ring or block to mount on the parts of easily wore, so the wear and corrosion resistance of the parts can be improved. With the emergence of high-performance ceramic materials, nozzle performance has been further improved. High-performance ceramic material has better heat resistance and fracture toughness than tungsten carbide materials, which has be widely used in many engineering, such as cutting tools, bearing parts, engine components and metallurgy, coal, chemical industry, abrasion and corrosion-resistant parts. The erosion resistance and service life of the ceramic nozzle is also far superior to ordinary metal and carbide nozzles. Especially when using quartz sand, slag and metal abrasives, abrasion resistance of the ceramic nozzle several times higher than carbide, but it is typical of a brittle material, easy to crack under the impact of the materials or peel off, and therefore not suitable for high-impact occasions using.

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