Production Technology
Hot rolled steel coil is a steel product made by hot rolling process. The production process generally involves the following key steps:
Raw material preparation: Use continuous casting slab or blooming slab as raw material.
Heating: The raw material is heated through a stepping furnace to reach a temperature suitable for rolling.
Descaling: After high pressure water descaling, remove the surface of the raw material oxide and other impurities.
Roughing: the heated raw material enters the roughing mill, and after preliminary rolling, the intermediate blank of a certain thickness is formed.
Finishing rolling: Intermediate blank cutting finishing. Enter the finishing mill for precision rolling to form the finished strip.
Cooling and coiling: Laminar cooling system cooling strip steel. The coiler will roll the strip into a roll shape, resulting in this coil.
Mechanical Properties and Applications of Hot Rolled Steel Coil
Hot rolled steel coil has good mechanical properties and processing properties, mainly including:
High strength: the hot rolling process makes the steel plastic deformation during the rolling process, which improves the strength of the steel.
Good toughness: It has good toughness and is easy to process and form.
Weldability: The weldability of this steel coil is excellent, which is convenient for welding connections during the manufacturing process.
Due to its excellent performance, it is widely used in the following fields:
Construction industry: Used in steel structural parts, Bridges, high-rise buildings, etc.
Machinery industry: can manufacture all kinds of mechanical parts, such as shaft, gear, bearing seat, etc.
Automotive industry: Used in the production of car body, chassis, wheel hub and other components.
Pressure vessels and boilers: It can manufacture high-pressure gas pressure vessels and boilers.
Types and Precautions of Hot Rolled Steel Coil
Hot rolled steel coils can be classified according to different production processes and applications, such as:
Straight hair coil: the steel coil without finishing treatment, the head and tail are like tongue and fishtail, and the thickness and width accuracy are poor.
Hot rolling finishing coil: After multiple cutting head, cutting tail, cutting edge, straightening, leveling finishing processing, the formation of higher precision steel coil.
Hot-rolled pickling coil: on the basis of hot-rolled finishing coil, the product formed after pickling to remove the oxide skin and oil, has the trend of partial replacement of cold-rolled plate.
In the production and use of this steel coil, the following matters need to be noted:
Ensure the normal operation and regular maintenance of production equipment.
Strictly control the rolling process parameters, such as temperature, speed, reduction and so on.
Quality inspection of finished steel coil to ensure compliance with relevant standards and user requirements.
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