China Various Thermocouple Protection Tubes of Metal Non-Metal Composite Materials

1 metal materials
This type of material is characterized by high mechanical strength, good toughness and good slag resistance; but the high temperature resistance is not good enough, and it is susceptible to corrosion.
2 Non-metallic materials
The characteristics of this type of material are: high temperature resistance, oxidation resistance, but not impact resistance, relatively brittle and fragile, unsatisfactory thermal conductivity, and poor thermal response sensitivity. Therefore, the pipe wall is generally required to be relatively thin, which brings a series of problems.
3 Composite materials
Cermet
Cermet is a composite material composed of one metal or alloy and another or several ceramics using powder metallurgy. It is characterized by the combination of the wear resistance, high temperature resistance, and oxidation resistance of ceramic materials, and the high strength of metal materials, but the thermal shock performance is poor. Generally suitable for use in liquid metals, such as molten iron, molten steel, and non-ferrous metal melts. In addition to Table 2, the commonly used non-metallic protective casing materials are used in some protective casings made of high-temperature wear-resistant materials, which are suitable for temperature measurement thermocouples, ball mills, and fans in boiling furnaces, circulating fluidized bed boilers, cement rotary kilns Used in places where temperature is measured at outlets and pipelines such as mills and coal pulverizers.
Composite coating
Surface coating technology can endow parts with a variety of special properties such as wear resistance, high temperature resistance, corrosion resistance, and oxidation resistance. It is a new surface technology that improves product quality, saves energy and resources, and obtains significant economic benefits. The use of material surface coating technology to solve the problems of high temperature corrosion and wear of workpieces is an international trend. This type of technology gives play to the advantages of surface technology, instead of mixing different materials to make composite materials, but combining different materials to play their own characteristics and obtain excellent performance.
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