Introduction of wear-resistant thermocouple protection tube material

It is often mentioned in the instrumentation industry, so what types can it be divided into? The editor of this site has summarized some information here, and introduced it in detail for everyone. Material of wear-resistant thermocouple protection tube 1. High-temperature alloy wear-resistant: Special heat-resistant and wear-resistant alloy materials are used as the temperature measurement outer protection tube, and the inner armored core has high corrosion resistance to particle erosion. It can also protect the inner core under high temperature conditions. It adopts flange or thread connection form, which can measure the temperature between 0∽1200℃ for a long time. 2. Cermet wear-resistance: Recrystallized silicon carbide cermet protection tube is used, the high temperature can reach 1300℃, and the K-index or S-index armored core is installed inside, which is specially suitable for high temperature resistance such as cement kiln tail and circulating fluidized bed. Temperature measurement in grinding conditions. 3. Composite casting wear-resistant alloy: The composite armoring technology is used to add wear-resistant particles to the high-temperature alloy matrix, and precision fusion-casting is used. No turning processing is required. The casing has high hardness, high temperature oxidation resistance, and has a few casting defects but does not affect the high temperature wear resistance and sealing performance. It uses a very common high temperature wear resistance casing, the price is moderate, and the use temperature is 800-1200°C. 4. Ion implantation of tungsten carbide: Using stainless steel as the matrix, ion implantation technology is used to inject tungsten carbide particles on the surface of the casing. With high hardness, high strength, high toughness, especially wear-resistant, the thickness of the wear-resistant layer is 0.5-1.5mm, the outer is hard and the inner is tough, the small diameter can reach φ8, the surface quality is good, and the use temperature is 0-800℃. The service life of coal mills in power plants is more than 2 years. 5. Iron-aluminum porcelain protection tube: iron base contains aluminum and cleverly added A12O3 powder to produce iron-aluminum porcelain (TLC) with special gold content. The iron-aluminum porcelain alloy is made into a thermocouple (resistance) protection tube, which becomes iron Aluminium-ceramic thermocouple (resistance) is a critical low piece-iron-aluminum-ceramic protection tube.

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