Cast iron low-temperature tufftriding system and process

The invention relates to the technical field of low-temperature tufftriding, and discloses a cast iron low-temperature tufftriding system and a cast iron low-temperature tufftriding process. Cast iron is prepared for protection; after protection preparation, storing in a shade room, and standing for drying; and after drying is completed, a tufftriding process is performed. The invention further provides a cast iron low-temperature tufftriding process. According to the cast iron low-temperature tufftriding system and process, before low-temperature tufftriding of cast iron, lacquer is smeared on the outer surface of the cast iron, a paint film is formed on the surface of the cast iron and can protect the cast iron, the paint film firstly acts on the paint film on the surface of the cast iron during low-temperature tufftriding, and damage of low-temperature tufftriding to the cast iron is relieved; and the paint film can be gradually combusted and dissolved at high temperature, so that the low-temperature tufft