Nano-metal ceramic wear-resisting draught fan

Abstract

The invention discloses a nano-metal ceramic wear-resisting draught fan. A main part impeller of the draught fan comprises multiple blades, a wheel cover and a hub. Fusion of mixed powder is conducted on the surfaces of all parts of the impeller through a laser fusion covering technology so that a wear-resisting layer can be formed on the surface of the impeller, wherein the mixed powder includes, by mass percent, 15.0%-25.0% of ferronickel, 10.0%-20.0% of ferroniobium, 2.0%-5.0% of ferrochromium powder, 1.0%-2.0% of zirconium dioxide, 0.1%-0.5% of silicon carbide, 0.1%-0.5% of titanium carbide and 0.1%-0.5% of niobium carbide. By means of the nano-metal ceramic wear-resisting draught fan, wear resistance and corrosion resistance of the impeller of the draught fan are obviously improved, and the service life of the impeller is prolonged.

Description

technical field [0001] The invention relates to the field of fluid machinery, in particular to a nano-cermet wear-resistant fan. Background technique [0002] Fan equipment widely used in electric power, steel, cement, paper and other industries, because the gas medium conveyed contains a large amount of hard dust particles and acid gas, the flow-passing parts of these equipment are subject to strong erosion and corrosion, especially their The impeller, the heart part, runs at a linear speed of 160m / s at the end of its blades, and the wear speed is more serious than other parts. According to statistics, the impeller made of ordinary carbon steel or general wear-resistant steel generally has a service life of only half a year, and the shortest is only a few tens of days. Polymer wear-resistant materials, etc., the service life is also difficult to be significantly improved. Among the more commonly used methods, surfacing welding is used more often, and the effect is accepta...

AI Technical Summary

Problems solved by technology

According to statistics, the impeller made of ordinary carbon steel or general wear-resistant steel generally has a service life of only half a year, and the shortest is only a few tens of days. Polymer wear-resistant materials, etc., it is difficult to significantly improve the service life

Among the more commonly used methods, surfacing welding is used more often, and the effect is acceptable. Generally, it can be used for more than one year without large-scale repairs. The disadvantage is that due to the large amount of heat input by surfacing welding, if the control is not good, it will cause deformation of the impeller. And it cannot be repaired and used repeatedly

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