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How to manufacture wear-resistant elbows

2021-07-29View Original

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Features and production process of ceramic-sheeted wear-resistant products: The ceramic-sheeted wear-resistant composite pipe is a new type of composite pipe developed by our company by drawing on advanced technologies from similar products both at home and abroad. It features a steel outer shell with ceramic wear-resistant sheets attached to its interior, offering high wear resistance and a long service life. Features: Uses anti-falling ceramic tiles; each side of the tiles is designed to interlock in a pressure-applying and pressure-receiving manner. Strong inorganic adhesive is used for bonding, combining the ceramic tiles with the steel structure to provide dual reinforcement and ensure that the tiles do not fall off. After pasting, it is welded and reinforced with energy-storing screws to ensure that the ceramic patches do not come loose. The ceramic tiles have a smooth surface, low operating resistance, and are less prone to scaling. It features flexible installation, high wear resistance, easy processing, and a moderate cost. Production process and description of self-propagating ceramic composite pipe fittings. Production process: Self-propagating ceramic composite steel pipes are manufactured using a self-propagating high-temperature centrifugal synthesis process. The tube is composed of three layers, from the inside out: corundum ceramic, a transition layer, and steel. The ceramic layer is a dense corundum porcelain formed at temperatures above 2200 degrees, and it forms a strong bond with the steel pipe through the transition layer. Performance features: It boasts excellent wear resistance, with an inner lining made of corundum porcelain (AL2O3). Its Mohs hardness is greater than 9.0, which is equivalent to an HRC value of over 90; as a result, it offers high wear resistance when used to transport any type of fluid in industries such as power generation, metallurgy, mining, coal mining, and chemicals. Its service life is more than 10 times that of ordinary steel. Due to the single, stable crystal structure of the corundum porcelain (AL2O3) inner lining, it can operate over a temperature range of -50 to 600°C. The linear expansion rate of this material is 6–8×10-6/°C. The inner surface of the composite steel pipe is smooth, resulting in low operating resistance. It also possesses comprehensive properties such as corrosion resistance and anti-scaling capabilities. It has good weldability, and can be connected using methods such as direct welding, flange connection, or quick pipe fittings, making its installation very convenient. Technical description of bimetallic composite casting: In response to the varying requirements of different types of products regarding material wear resistance, heat resistance, and impact resistance, our company has developed a series of wear-resistant and heat-resistant alloy castings. These products are made from high-quality raw materials, to which alloying elements such as Cr, Ni, Mn, Mo, Ti, Si, as well as rare earth elements, are added according to specific requirements. They are forged using high-efficiency medium-frequency furnaces, and the most advanced lost foam casting technique available in China is employed in their production. Note: Fittings and steel pipes with a diameter of DN250 and below are manufactured using the self-propagating ceramic composite fitting production process; fittings and steel pipes with diameters of DN450 and DN700 are produced using the ceramic coating wear-resistant process, while flange covers are fabricated through the bimetallic composite casting process.
Reply #22021-07-29
The wear-resistant elbows for new types of pneumatic ash conveying pipes are generally designed in three forms: for parallel ash conveying pipelines, tubular lining wear-resistant corundum ceramic elbows can be used; for the first few elbows where the pressure is high at the front end of the ash conveying pipes, backpack-type wear-resistant elbows can be employed; and for the ash conveying elbow at the very top of the vertical section of the storage tank, spherical wear-resistant elbows are used. I. Ceramic wear-resistant elbows are manufactured using a high-tech production process—the self-propagating high-temperature synthesis method. This tube is composed of three layers from the inside out: corundum ceramic, a transition layer, and steel. The ceramic layer is dense corundum porcelain (AL2O3) formed at high temperatures above 2200°C, and it forms a strong bond with the steel pipe through the transition layer. Composite pipes take full advantage of the high strength, good toughness, impact resistance, and excellent weldability of steel pipes, as well as the high hardness, high wear resistance, corrosion resistance, and heat resistance of corundum ceramics, thereby overcoming the shortcomings of steel pipes such as low hardness and poor wear resistance, as well as the poor toughness of ceramics. Therefore, composite pipes possess excellent comprehensive properties such as wear resistance, heat resistance, corrosion resistance, as well as resistance to mechanical and thermal shocks, along with good weldability; they make them ideal wear-resistant and corrosion-resistant pipes for transporting granular materials, in grinding applications, and with corrosive media.

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