Which one is more temperature-resistant and wear-resistant, 1Cr18Ni9Ti or Cr5Mo?

Cr5Mo is more wear-resistant than 1Cr18Ni9Ti at high temperatures, but its corrosion resistance is slightly inferior. The regenerator thermocouple should be composite and wear-resistant. For special treatment, each company has different tricks and steals technology from each other. The sprayed ones are not as wear-resistant as the composite ones. There are methods such as vacuum casting, etc., and they probably contain ingredients such as tungsten and platinum. Even rocket materials were used. With the cutting sleeve, there will be no leakage even if the thermocouple is broken. Big manufacturers have specialized products. At the same time, add a layer of casing outside the thermocouple casing, called the scapegoat. Grind it first, and then it is the turn of the thermocouple. A production cycle must be adhered to, usually one and a half years. Otherwise, we can only give up this point or stop work.

2# Changfeng Tens of Thousands of Miles Thank you teacher for your answer! This is what happened: There is a catalytic device being repaired, and a "skylight" needs to be opened on the wall about one meter above the regeneration inclined pipe at the bottom of the regenerator (2000 * 4200) and replace the walls with new ones. A new thermocouple needs to be installed in this "skylight" by temporarily opening a hole. After the hole is opened, a protective sleeve must be welded into the wall of the device (the "scapegoat" you call it). The construction staff brought a piece of white steel pipe and asked the instrumentation staff if this would work? instrument man said: “No, because the white steel pipe (1Cr18Ni9Ti) is not as wear-resistant as the Cr5Mo pipe." The construction workers said: White steel pipe (1Cr18Ni9Ti) is more wear-resistant and temperature-resistant than Cr5Mo pipe." I don't know much about this, so I ask this question.

1Cr18Ni9Ti is acid-resistant stainless steel, Cr5Mo heat-resistant stainless steel

Use Cr5Mo. Corrosion of catalytic devices is generally very light.

The functions of alloying elements such as chromium (Cr) nickel (Ni) manganese (Mn) molybdenum (Mo) titanium (Ti) tungsten (W) in alloy steel: ⑴chromium: It can improve the strength, hardness and wear resistance of steel, and can also produce passivation to improve the material's tensile, corrosion, and heat resistance (2) Nickel: It can make steel have high strength while maintaining good plasticity and toughness (3) Manganese: Can significantly improve the hardenability of steel (4) Molybdenum: Can improve the high temperature strength, creep strength, and durability strength of steel ⑸Titanium: It can improve the corrosion resistance and heat resistance of steel, refine the grains, increase strength and toughness ⑹ Tungsten: The effect on the performance of steel is similar to that of molybdenum. Tungsten has a higher hardness than molybdenum and can form tungsten carbide with carbon. It has high hardness and wear resistance and is an important heat-strength element in heat-resistant steel. It seems that Cr5Mo is more wear-resistant than 1Cr18Ni9Ti.