What are the main uses of high-temperature electric heating wires? What are its advantages and disadvantages?

What are the main uses of high-temperature electric heating wires? What are its advantages and disadvantages?

Iron chromium aluminum and nickel chromium electric heating alloys generally have strong oxidation resistance. However, due to the presence of various gases in the furnace, such as air, carbon atmosphere, sulfur atmosphere, hydrogen, nitrogen atmosphere, etc., these gases have an impact on the components during high-temperature use. Although various electric heating alloys undergo oxidation treatment before leaving the factory, they can cause damage to the components to a certain extent during transportation, winding, installation, and other processes, thereby reducing their service life, To extend the service life, customers are required to undergo pre oxidation treatment before use. This method involves heating the installed electric heating alloy components in dry air to a temperature 100-200 degrees below the allowable high usage temperature of the alloy, holding them for 5-10 hours, and then slowly cooling them in the furnace.

Advantages and disadvantages

1. The main advantages and disadvantages of the iron chromium aluminum alloy series are: advantages: the iron chromium aluminum electric heating alloy has a high operating temperature, with a high operating temperature of up to 1400 degrees (0Cr21A16Nb, 0Cr27A17Mo2, etc.), long service life, high surface load, good oxidation resistance, high electrical resistivity, and low price. Disadvantages: Mainly due to low high-temperature strength, its plasticity will increase with the increase of usage temperature, and the components are prone to deformation, not easy to bend and repair.

2. The main advantages and disadvantages of the nickel chromium electric heating alloy series are: advantages: high temperature strength is higher than that of iron chromium aluminum, it is not easy to deform under high temperature use, its structure is not easy to change, its plasticity is good, it is easy to repair, its radiation rate is high, it is non-magnetic, has strong corrosion resistance, and has a long service life. Disadvantages: Due to the use of nickel metal materials, the price of this series of products is several times higher than that of iron chromium aluminum, and the usage temperature is lower than that of iron chromium aluminum.

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