High-temp alloy for temp-measuring thermocouple protection tube of cement rovolving kilin

Abstract

The invention discloses a concrete rotary kiln temperature detecting thermocouple protection use high temperature alloy that contains Si less than 1.0%, Mn less than 2.0%, Ni 5-15%, Cr 22-35%, Al 4-9%, Mo 2-6%, Re less than 1.0, and the rest is Fe. The invention is low cost and has long useful life.

Description

technical field [0001] The invention relates to a metal alloy, in particular to a superalloy for a cement rotary kiln temperature measuring thermocouple protection tube. Background technique [0002] The measurement and control of the kiln temperature is the key to the quality control of its cement. Due to the harsh conditions such as high temperature corrosion, cavitation, erosion, and impact in the cement rotary kiln, the requirements for the thermocouple protection tube are very strict. For a long time, the temperature measurement protection of the cement rotary kiln It has always been a difficult problem to use superalloy materials for pipes. [0003] At present, materials commonly used in China, such as GH3039, Haynes 214, Haynes 230, corundum and silicon carbide, have a relatively short service life, usually only a few days or more than ten days; foreign countries use stainless steel surface composite hard chrome technology or ODS alloy, and the service life can be ext...

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Problems solved by technology

[0003] At present, materials commonly used in China, such as GH3039, Haynes 214, Haynes 230, corundum and silicon carbide, have a relatively short service life, usually only a few days or more than ten days; foreign countries use stainless steel surface composite hard chrome technology or ODS alloy, and the service life can be extended. It lasts for several months, but the process is complicated, the equipment requirements are high, the price is very expensive, and there is no domestic production