In industrial production, wear-resistant thermistor is a key temperature measuring element in high temperature and high wear environments, and its material selection directly determines the reliability and service life of the equipment. Faced with abnormal working conditions in industries such as cement, metallurgy, and power, its materials need to meet multiple stringent requirements to ensure accurate temperature measurement and long-term stable operation.

　　1、 Core material performance requirements

The material of wear-resistant thermistor needs to have comprehensive characteristics of high temperature resistance, wear resistance, and corrosion resistance. According to the reference materials, the protective tube materials are mainly divided into four categories:

1. Wear resistance of high-temperature alloys: Special heat-resistant alloys (such as K1320) are used, which can resist particle erosion at 0-1200 ℃ and are commonly used in high-temperature environments in the metallurgical industry.

2. Composite casting wear-resistant alloy: It is formed by melting wear-resistant particles into a high-temperature alloy matrix, with high hardness and resistance to high-temperature oxidation. It is suitable for medium to high temperature scenarios of 800-1200 ℃ and has outstanding cost-effectiveness.

3. Wear resistance of metal ceramics: With recrystallized silicon carbide (SiC) as the core material, it can withstand temperatures up to 1300-1600 ℃ and is specially designed for strong wear and corrosion conditions such as cement kiln tail and circulating fluidized bed. As mentioned in the reference materials, the metal ceramic protective tube has both high hardness and thermal stability.

4. Ion implantation of tungsten carbide: Injecting tungsten carbide particles onto the surface of a stainless steel substrate to form a high hardness, high toughness wear-resistant layer, particularly suitable for high impact load environments.

　　2、 Collaborative design of internal core and connecting components

The armor core of wear-resistant thermistor is usually made of platinum resistor (Pt100) or nickel chromium nickel silicon (K-scale) material to ensure stable resistance signal output at high temperatures. Meanwhile, materials for connecting rods, flanges, and other components should be selected based on the characteristics of the on-site medium. If corrosive gases (such as sulfides) are present, stainless steel or corrosion-resistant alloys should be used to avoid signal distortion caused by electrochemical corrosion.

　　3、 Structural Design and Process Optimization

The protective tube of the wear-resistant thermistor is formed through integral drilling or precision casting process to ensure that the internal armor core is fully protected. Some models also combine ion implantation technology to form a micrometer level wear-resistant layer on the surface of the protective tube, further extending its service life to 1-2 years.

　　4、 Summary

The selection of materials for wear-resistant thermistors is a balancing science that requires comprehensive consideration of factors such as temperature range, wear strength, and corrosive media. From high-temperature alloys to metal ceramics, from precision casting to surface treatment, the optimization of each material and process is aimed at achieving precise temperature measurement and long-term durability in abnormal environments, providing solid guarantees for the safety and efficiency of industrial production.