Steel-backed 99% SiC Ceramic Pipe is a composite wear-resistant pipe with a high-purity silicon carbide ceramic inner lining and a steel outer backing. It combines the high hardness and wear resistance of silicon carbide ceramic with the high strength and toughness of steel, offering excellent overall performance. The following is a detailed description:

Structure and Materials

Inner Lining Material: The inner lining is made of 99% pure silicon carbide (SiC) ceramic, which has a Mohs hardness of over 9.5 and a microhardness of 2500-3000 HV. It offers extremely high wear resistance and hardness, 

Second only to diamond.

Outer Layer Material: The outer steel backing is typically made of high-quality carbon structural steel such as Q235 and Q345, or stainless steel such as 304 and 316L. The steel backing provides the necessary strength and toughness to withstand external pressure, mechanical shock, and the various stresses of installation and transportation. Bonding Method: The SiC Ceramic Lining is tightly bonded to the steel backing through specific processes such as hot pressing, hot isostatic pressing, and reaction sintering. This creates a well-bonded interface between the ceramic and steel layers, ensuring they will not separate during use.

Performance Characteristics

High Wear Resistance: Due to the high hardness and excellent wear resistance of SiC ceramic, steel-backed 99% SiC Ceramic pipes effectively resist erosion and wear from materials. In applications such as conveying high-hardness granular materials in mining, power generation, and metallurgy, their wear resistance is several times, or even dozens of times, higher than that of ordinary steel pipes.

High Corrosion Resistance: SiC ceramics exhibit excellent chemical stability. With the exception of hydrofluoric acid, they exhibit excellent corrosion resistance to most acidic and alkaline solutions, as well as halogen gases. They can withstand long-term use in harsh chemical environments such as strong acids and bases. Steel-backed 99% SiC ceramic Pipes effectively prevent corrosion and extend their service life. Excellent High-Temperature Resistance: 99% SiC ceramics can operate stably over a temperature range of -50°C to 1450°C, with a peak temperature tolerance of up to 1600°C, meeting the requirements of many high-temperature industrial applications.

Excellent Thermal Shock Resistance: SiC ceramics have a low coefficient of thermal expansion of 4.0-5.0×10⁻⁶/K and high thermal conductivity, enabling rapid heat dissipation. Therefore, steel-backed 99% SiC Ceramic Tubes are less susceptible to cracking and spalling due to thermal stress in environments subject to rapid temperature fluctuations.

High Mechanical Strength: SiC ceramics inherently possess high bending strength, reaching 500-700 MPa. Combined with the support of the outer steel backing, the overall mechanical strength of the pipe is high, capable of withstanding certain external pressures and mechanical shocks.

Applications

Mining Industry: They can be used in applications such as tailings slurry transportation and ore pellet transportation. They effectively resist wear from high-hardness ore sands, reducing pipe replacement frequency and maintenance costs. Power Industry: Suitable for pipelines used in power plants for pulverized coal transportation, ash discharge, and desulfurization slurry transportation. It improves pipe wear and corrosion resistance, ensuring stable power generation.

Metallurgical Industry: Suitable for use in steel mills' blast furnace coal injection and slag conveying pipelines, as well as in steelmaking for ferroalloy transportation and refining. It meets high-temperature, wear-resistant, and corrosion-resistant requirements, improving the efficiency and reliability of metallurgical production.

Chemical Industry: Suitable for transporting various corrosive chemical media, such as strong acids, strong bases, and organic solvents. It effectively prevents pipeline corrosion and leaks during chemical production, ensuring production safety.