The self-propagating ceramic composite pipe is manufactured by self-propagating high-temperature synthesis-centrifugation. The steel pipe is placed in the tube mold of the centrifuge, and a mixture of iron red and aluminum powder is added into the steel pipe. This mixture is called a thermal agent in chemistry. When the centrifuge tube mold rotates to a certain speed, it is ignited by a Mars. The aluminothermic agent, the aluminothermic agent immediately burns itself, the burning wave spreads rapidly, and the violent chemical reaction occurs during the spread.
The self-propagating ceramic composite pipe has fully exerted the high strength, good toughness, impact resistance, good welding performance and high hardness, high wear resistance, corrosion resistance and heat resistance of the corundum steel, which overcomes the low hardness and poor wear resistance of the steel pipe. The characteristics of poor ceramic toughness. Therefore, the self-propagating ceramic composite pipe has good comprehensive properties such as good wear resistance, heat resistance, corrosion resistance, mechanical shock resistance, thermal shock resistance and good weldability. It is an ideal wear-resistant and corrosion-resistant pipe for conveying granular materials, grinding and corrosive media.
Performance characteristics of self-propagating ceramic composite pipe:
1, good wear resistance
Self-propagating ceramic composite pipe has a Mohs hardness of 9.0 equivalent to HRC90 or more because the inner liner is corundum ceramic (a-AL2O3). Therefore, the grinding medium conveyed by the metallurgy, electric power, mining, coal and other industries has high wear resistance. It has been confirmed by industrial operation that its wear life is ten times or even several times that of hardened steel.
2, the running resistance is small
Since the self-propagating ceramic composite pipe is smooth and never rusted, it does not have a convex spiral on the inner surface of the seamless steel pipe. Tested by the relevant testing unit for the inner surface roughness and water resistance characteristics, the inner surface smoothness is better than any metal pipe, and the clearing resistance coefficient is 0.0193, which is slightly lower than the seamless pipe. Therefore, the tube has the characteristics of small running resistance and can reduce operating costs.
3, corrosion resistance, anti-fouling
The self-propagating ceramic composite pipe is a neutral property because the steel ceramic layer is (a-AL2O3). Therefore, it has acid and alkali resistance and seawater corrosion resistance, and at the same time has anti-scaling and other characteristics.
4, temperature resistance and heat resistance
The self-propagating ceramic composite tube is a single stable crystalline structure due to the corundum ceramic (a-AL2O3). Therefore, the composite pipe can operate normally for a long time in the temperature range of -50--700 °C. The coefficient of linear expansion of the material is 6-8×10-6/0C, which is about 1/2 of that of the steel pipe. The material has good thermal stability.
5, the project cost is low
The self-propagating ceramic composite tube is light in weight and suitable in price. It is 50% lighter than the inner diameter of the cast stone tube; it is 20-30% lighter than the wear-resistant alloy tube, and has good wear resistance and corrosion resistance, because of the long service life, thus the cost of the hanger, the handling fee, the installation fee, and Operating costs are reduced. Compared with the actual project budget and engineering practice of the design institute and the construction unit, the cost of the pipe project is equivalent to that of the cast stone. Compared with the wear-resistant alloy pipe, the project cost is reduced by about 20%.
6, easy to install and construct
The self-propagating ceramic composite pipe has a light weight and good welding performance. Therefore, welding, flange, quick coupling, etc. can be adopted, and the construction and installation are convenient, and the installation cost can be reduced.
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