Because the pipe has high wear resistance, corrosion resistance and heat resistance, it can be widely used in electric power, metallurgy, mining, coal, chemical industry and other industries to transport abrasive particles such as sand, stone, pulverized coal, ash, aluminum liquid and so on. material and corrosive medium, the metal-ceramic composite pipe is an ideal anti-corrosion pipe.
The composite pipe has overcome the low hardness, poor wear resistance and poor ceramic toughness of the steel pipe due to its high strength, good toughness, good impact resistance, good welding performance, and high hardness, high wear resistance, corrosion resistance and heat resistance of corundum porcelain. specialty. Therefore, the composite pipe has good comprehensive properties such as wear resistance, heat resistance, corrosion resistance, mechanical and thermal shock resistance, and good weldability. It is an ideal wear-resistant and corrosion-resistant pipeline for conveying granular materials, grinding, and corrosive media.
The ceramic layer is replaced on the inner surface of the wear-resistant ceramic elbow. Compared with carbon steel and manganese steel pipes, the wear resistance is improved to a certain extent, but because the reaction temperature is not high (the average does not exceed 1200 ℃), the reaction time is short, The reduced alumina still stays in the low temperature phase β-Al2O3, and cannot be converted into the high temperature phase α-Al2O3 (transformation temperature exceeds 1300 °C). Both are alumina, but the properties such as strength, hardness and density between high temperature phase alumina and low temperature phase alumina are vastly different. Due to the short reaction time, the centrifugal separation of low-temperature phase alumina and molten iron is not complete, resulting in a non-dense ceramic layer, loose particles and low hardness. The wear-resistant ceramic elbow is lined with 95 ceramics, the alumina content is not less than 95%, and all are high-temperature phase α-Al2O3, and the sintering temperature is as high as 1670 ° C to ensure the quality of the material.
