The disadvantage of nickel chromium alloy heating wire is that the operating temperature cannot reach the level of the previous type of heating wire

The disadvantage of nickel chromium alloy heating wire is that the operating temperature cannot reach the level of the previous type of heating wire

1. The working principle of electric heating wire is the same as that of other metal heating elements, both of which are the electric heating phenomenon after the metal is electrified. Electric heating refers to the generation of a certain amount of heat by the current passing through a conductor, which is then transferred out by the conductor. The electric heating wire itself is a metal conductor, which will emit heat and provide thermal energy after being electrified.

2. The classification of electric heating wire types is based on the different chemical element content and organizational structure of the electric heating wire. The types of electric heating wires include iron chromium aluminum alloy electric heating wires and nickel chromium alloy electric heating wires. These two types of electric heating wires, as heating elements, have different functional characteristics.

3. The advantages and disadvantages of iron chromium aluminum alloy electric heating wires are high operating temperatures. Experiments have shown that the maximum operating temperature of iron chromium aluminum alloy electric heating wires can reach 1400 ℃. The iron chromium aluminum alloy electric heating wire has a long service life, high electrical resistivity, high surface composite, and good oxidation resistance. The disadvantage of iron chromium aluminum alloy electric heating wires is that they have lower strength in high-temperature environments. As the temperature increases, the plasticity of iron chromium aluminum alloy electric heating wires will be enhanced. This means that iron chromium aluminum alloy electric heating wires are prone to deformation at high temperatures and are difficult to repair after deformation.

4. The advantages and disadvantages of nickel chromium alloy electric heating wires are their high strength in high-temperature environments, their resistance to deformation and structural changes during long-term high-temperature operation, and their good plasticity at room temperature, making repair after deformation relatively simple.

In addition, nickel chromium alloy heating wires have high radiation rate, no magnetism, good corrosion resistance, and long service life. The disadvantage of nickel chromium alloy heating wire is that the operating temperature cannot reach the level of the previous type of heating wire. The manufacturing of nickel chromium alloy heating wires requires the use of nickel, which is more expensive than iron, chromium, and aluminum. Therefore, the manufacturing cost of nickel chromium alloy heating wires is higher, which is not conducive to cost control.

An important parameter of electric heating wire is surface power. If the resistivity is too high, the surface power will also increase when a certain current is applied. So for low-power appliances, small diameter and small current are chosen, but the size of the current depends on the size of the resistance. The larger the current in the heating wire, the higher the temperature of the heating wire. The lower the current in the electric heating wire, the lower the temperature of the electric heating wire. The length and diameter of the electric heating wire are calculated.

Looking at the color of the electric heating wire, as the temperature increases, it changes from dark red to bright red, then from near yellow to white, reaching a dazzling blue white color. Based on this fact, the temperature of an object can be determined by the color of its light emission. The electric heating wire has a high temperature (1100 ℃) and is yellow red in color. The electric heating wire has a higher temperature (1300 ℃) and is yellow white in color. Achieve a dazzling blue and white color (1500 ℃) or higher.

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