Classification and comparison of the types of heating wires

Classification and comparison of the types of heating wires

The types of heating wires are classified according to their chemical element content and organizational structure. There are iron-chromium-aluminum alloy heating wires and nickel-chromium alloy heating wires. These two heating wires are used as heating elements and have different functional characteristics.

Advantages and disadvantages of iron-chromium-aluminum alloy heating wire

The advantage of the iron-chromium-aluminum alloy heating wire is its high operating temperature. The experiment shows that the higher operating temperature of the iron-chromium-aluminum alloy heating wire can reach 1400°C. The iron-chromium-aluminum alloy heating wire has long service life, high resistivity, high surface compounding, and good oxidation resistance.

The disadvantage of the iron-chromium-aluminum alloy heating wire is its low strength in high temperature environments. As the temperature increases, the plasticity of the iron-chromium-aluminum alloy heating wire will increase, which means that the iron-chromium-aluminum alloy heating wire is prone to deformation at high temperatures. And it is not easy to repair after deformation.

 Advantages and disadvantages of nickel-chromium alloy heating wire 

The advantages of nickel-chromium alloy heating wire are high strength in high temperature environment, long-term high temperature operation is not easy to deform, and it is not easy to change the structure, and the nickel-chromium alloy heating wire has good normal temperature plasticity, and the repair after deformation is relatively simple. In addition, the nickel-chromium alloy heating wire has high emissivity, non-magnetic, 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 heating wire. The manufacture of nickel-chromium alloy heating wires requires the use of nickel. The price of this metal is higher than that of iron, chromium and aluminum. Therefore, the manufacturing cost of nickel-chromium alloy heating wires is relatively high, which is not conducive to cost control.