What are the heating wire materials in the electric heating tube?
Heating wire is a metal wire with high resistivity that generates heat when energized. The heating wire is the core heating element in the heating tube.
Common heating wires on the market include Fe-Cr-Al alloy heating wire and Ni-Cr alloy heating wire. These two kinds of heating wires are used as the heating element of the electric heating tube, and have their own characteristics in function and performance.
1. Fe-Cr-Al alloy heating wire: made of iron, chromium and aluminum.
Advantages: fe-cr-aluminum alloy heating wire has high temperature resistance, good oxidation resistance, long service life, large surface load, high resistivity and low price.
Disadvantages: low strength in high temperature environment, it will deform as the temperature rises, and it is not easy to recover after deformation.
2. Nickel-chromium alloy heating wire: a heating wire composed of nickel and chromium.
Advantages: Ni-Cr alloy heating wire is not easy to deform under high temperature, its structure is not easy to deform, good plasticity, easy to maintain, high emissivity, non-magnetic, strong corrosion resistance, long service life.
Disadvantages: Due to the scarcity of nickel metal materials, the price is several times higher than that of Fe-Cr-Al alloy heating wire.