rolls for roller hearth slab reheat furnaces by Qingdao Hexin Machinery Co.,Ltd.
rolls for roller hearth slab reheat furnaces : Rolls for roller hearth slab reheat furnaces usually uses normalizing furnace, glowing furnace. Under hydrogen nitrogen protective atmosphere, furnace bottom roll temperature is about 900 degrees in heat treatment furnace, its role is to evenly and rapidly transport wide and thick plate in order to complete the heat treatment process. Thick plate heat treatment furnace roll are usually used for n ormalizing furnace and hardening furnace, under the hydrogen nitrogen protective environment, Furnace temperature is about 900 ℃ ， to complete heat treatment process by transporting lenient plate with even rapid, the diameter of roller is 300-400mm,centrifugal casting for roll body, precision casting for journal and end bell, forging for shaft head. Common used material is: ZG40Cr25Ni20Si2 、 ZG14Ni32Cr20Nb 、 ZG45Ni48Cr28W5Si2.