centrifugal cast hot bridle rolls

　　





Continuous annealing furnace roller
Furnace rolls are essential equipment in the strip steel continuous annealing furnace. In order to ensure the continuous operation of the strip steel, the continuous annealing furnace rolls must have the characteristics of thermal shock resistance, anti-nodulation, and good wear resistance, so as to ensure the continuous annealing furnace. Normal production and operation, so as to ensure that the strip products are qualified. Due to the continuous and stable operation of the continuous annealing unit, cold-rolled products with stable performance, good surface and shape can be produced. Therefore, the furnace roll of the continuous annealing furnace is the core part to ensure the stable operation of the strip steel continuous annealing unit.
 
 
Hexin specializes in the production of furnace rolls of various specifications and materials, which are mostly used in horizontal annealing furnaces for continuous annealing and galvanizing lines. The furnace rolls are uniformly and quickly conveyed steel strips to complete the annealing process under a nitrogen-hydrogen protective atmosphere; the furnace roll body adopts centrifugal Casting, the bell mouth adopts precision casting technology, and the shaft head is mostly forging. Mature production technology, 100% penetration testing of products to ensure product quality.
Our company specializes in the production of horizontal annealing furnace rollers and vertical annealing furnace rollers. The applicable temperature of the furnace rollers is 700-1000 degrees, and the diameter is 100-500mm. , Roller body and journal (ZG30Cr26Ni12, ZG40Cr25Ni20Si2).
 
The steel strip in the annealing furnace has to go through the process of temperature rise and fall, so the material of the furnace roller is generally Ni-Cr heat-resistant steel alloy, and its service temperature is mostly ≤900°C. Centrifugal casting and static casting processes are mostly used, combined with forging, finishing, etc., to meet the manufacturing accuracy requirements of furnace rollers. Taking the furnace roll in the heating section of the continuous annealing furnace unit as an example, this type of furnace roll is mainly composed of five parts: two ends of the shaft head, two sections of cone, and one section of centrifugal casting tube. The middle centrifugal casting tube is made of heat-resistant steel and adopts centrifugal casting Technology, the two-section cone adopts static casting technology, and the shaft heads at both ends are mostly processed by forging shafts, and finally processed by welding machines. Relevant welds need 100% PT inspection, and there must be no defects such as microcracks, slag inclusions, and pores, otherwise the welds will crack during production and use. The welded rolls also need to be heat treated and annealed to remove welding stress.