Hearth rolls are indispensable processing equipment in the steel plate smelting production process. In order to ensure the requirements of steel plate production, hearth rolls also have high requirements for use. The hearth roll is a typical centrifugal casting pipe fitting, one of the important parts for supporting and transporting the slab in
Metallurgical Equipment, and is widely used in the steel plate continuous casting and rolling production line.
During the rolling process, the slab needs to be continuously and stably heated to a rolling temperature of 1050-1150°C in the heating furnace first, and the slab is stably supported by hearth rollers to ensure smooth and uniform transportation. Since the middle section of the hearth roll is directly installed in the billet calciner, the temperature of the furnace gas during the production process is as high as 1150°C, and it is usually made of high-temperature alloy materials such as ZG45Cr28Ni48W5Si2. At the same time, since the supporting part in the middle of the hearth roller is directly installed in the furnace, while the cone section and the bearing support part are respectively installed in the furnace wall and outside the calcination furnace, the temperature gradient of different parts of the hearth roller is very large, so The hearth roller is generally welded by the cylinder, the cone and the shaft. In order to reduce the burning loss on the inner surface of the cone, a heat shield is designed inside the cone. In order to ensure the smooth conveying of the high-temperature slab, it is required that the roller shaft is not deformed and the outer roller ring is heat-resistant and wear-resistant.
Now everyone understands the application of hearth roller remetallurgy. Only by understanding its function can we use it better. Moreover, in order to ensure the good performance of the hearth roller and prolong the service life, regular inspection and maintenance should be carried out.
