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Carbon Steel coil
 
Hot-rolled steel products include steel strips (coils) and steel sheets cut from them. The steel strip (roll) can be divided into straight hair rolls and finishing rolls (divided rolls, flat rolls and slit rolls).

Hot rolled steel coil is a kind of smelting material, which belongs to a kind of plate. It is mainly rolled by a continuous hot rolling mill. The hot-rolled sheet finally rolled by the continuous rolling mill can be pickled, annealed, and then rolled into a coil. The hot-rolled sheet in the coil is called hot-rolled steel. roll
Hot rolled steel coil is a technical term for metallurgy. Hot-rolled sheet is a kind of smelting material, which belongs to a kind of plate, and its thickness range is generally specified as 1.2~6mm.1) The cold-rolled sheet is cold-rolled, and the surface has no oxide skin and is of good quality. The hot-rolled sheet is processed by hot rolling, and the surface has an oxide scale, and the thickness of the sheet is poor.
2) The hot-rolled sheet has poor toughness and surface smoothness, and the price is low, while the cold-rolled sheet has good stretchability and toughness, but the price is more expensive.
3) Rolling is divided into cold-rolled and hot-rolled steel sheets, and the recrystallization temperature is the distinguishing point.
4) Cold rolling: Cold rolling is generally used to produce strip, and its rolling speed is relatively high. Hot rolled sheet: hot rolling temperature and forging temperature
5) The surface of the non-plated hot-rolled steel plate is dark brown, and the surface of the non-plated cold-rolled steel plate is gray. After electroplating, it can be distinguished from the smoothness of the surface. The smoothness of the cold-rolled steel plate is higher than that of the hot-rolled steel plate.
Cold rolling is made of hot-rolled coils as raw materials and rolled at room temperature below the recrystallization temperature. Cold-rolled steel plates are steel plates produced through cold-rolling processes, referred to as cold plates. The thickness of cold-rolled sheet is generally between 0.1-8.0mm. The thickness of cold-rolled sheet produced by most factories is less than 4.5mm. The thickness and width of cold-rolled sheet are determined according to the equipment capacity of each factory and market demand.
Cold rolling: Hot-rolled steel coil is used as raw material, after pickling to remove oxide scale, cold rolling is carried out. The finished product is hard-rolled coil. The cold-work hardening caused by continuous cold deformation increases the strength, hardness and toughness of the hard-rolled coil. The plastic index is reduced, so the stamping performance will deteriorate, and it can only be used for simple deformed parts. Hard-rolled coils can be used as raw materials for hot-dip galvanizing plants, because hot-dip galvanizing units are equipped with annealing lines. The weight of the rolled hard coil is generally 6 to 13.5 tons, and the steel coil is continuously rolled on the hot-rolled pickled coil at room temperature. The inner diameter is 610mm.
Cold rolling is processed and rolled on the basis of hot rolled coils. Generally speaking, it is a process of hot rolling---pickling---cold rolling.
Cold-rolled strips are widely used, such as automobile manufacturing, electrical products, rolling stock, aviation, precision instruments, food cans, etc. Cold rolled steel sheet is the abbreviation of ordinary carbon structural steel cold rolled plate, also called cold rolled plate

 

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