▎ 摘　　要

NOVELTY - The utility model belongs to the technical field of heating plate, and claims a new composite heating plate capable of replacing railway traditional electric heating chip, comprising an iron-chromium-aluminium heating layer, the upper and lower two sides of the iron-chromium-aluminium heating layer are fixedly installed with a polyimide film; the upper and lower sides of the polyimide film are fixedly mounted with a silicon adhesive tape insulating layer; the outer side of the silicon adhesive tape insulating layer is fixedly mounted with an aluminium profile shell; the outer surface of the aluminium profile shell is coated with a graphene coating. The utility model uses the iron-chromium-aluminium heating layer to replace the original nickel-chromium base material; at the same higher use temperature, greatly increasing the service life of the device; the iron aluminium material has high surface load, fast temperature rise, small specific gravity, high resistivity; spraying graphene material on the surface of the device for radiating, so that the heat conduction speed of the device, improves the heat efficiency of the device, reduces the energy consumption, and has good environment-friendly effect.