Hot rolling is the process of using slabs (mainly continuous casting slabs) as raw materials, and heating them to produce strip steel by roughing and finishing mills. Hot steel from the finishing mill
The belt is cooled by laminar flow to a set temperature, and then rolled into steel strip coils by a coiler. The cooled steel strip coils pass through different finishing lines according to different needs of customers
(Flattening, straightening, cross cutting or longitudinal cutting, inspection, weighing, packaging, marking, etc.) is added to form steel plate, flat roll, and longitudinally cut steel strip products. To put it simply,
"After heating a steel billet (that is, a red and hot piece of steel that is burned on television), it is finely rolled through the pass, trimmed, and corrected to become a steel plate. This is called hot rolling.".
Cold rolling: Hot rolled steel coils are used as raw materials and undergo acid pickling to remove oxidation before being subjected to cold continuous rolling. The finished product is rolled hard coils, which are hardened due to cold work hardening caused by continuous cold deformation.
The strength and hardness of the roll increase, and the toughness and plasticity index decrease, so the stamping performance will deteriorate, and can only be applied to parts with simple deformation. Hard rolled coils can be used as raw materials for hot dip galvanizing Material, because hot galvanizing units are equipped with withdrawal lines. The weight of the rolled hard coil is generally between 6 and 13.5 tons. The steel coil is continuously rolled at room temperature through hot rolling and pickling. The inner diameter is 610mm.
The difference between hot rolled plate and cold rolled plate can be attributed to the following points:
1. The cold plate adopts the method of cold binding and surface oxidation, with good quality. Hot plate mining and hot stamping have oxidation on the surface, and the plate thickness has a lower difference.
2. Hot rolled sheet has poor toughness and surface smoothness, and its price is relatively low. Cold rolled sheet has good extensibility and toughness, but its price is relatively expensive.
3. Rolling is divided into cold rolling and hot rolling, with recrystallization temperature as the dividing point.
4. Cold rolling: Cold rolling is generally used to produce strip, with a higher rolling speed. Hot rolling: The temperature of hot rolling is similar to that of forging
5. The surface of the hot rolled plate without electroplating shall be brown, and the surface of the cold rolled plate without electroplating shall be gray. After electroplating, the smoothness of the cold rolled plate can be distinguished by the smoothness of the surface, apply to the hot rolled plate.
We can offer Stainless Steel Pipe products, including Stainless Steel Capillary Pipe, Stainless Steel Precision Pipe, Stainless Steel Seamless Pipe , Stainless Steel Sanitary Pipe , Thick Wall Stainless Steel Pipe, Stainless Steel Bright Tube , Stainless Steel Needle Tube , Stainless Steel Fine Tube , Stainless Steel Coil , Welded Stainless Steel Pipe , Stainless Steel Industrial Pipe, Stainless Steel Round Tube , Medical Stainless Steel Tube , Stainless Steel Thin Wall Tube , Stainless Steel Shaped Tube , Stainless Steel Elbow , Stainless Steel Snake Bone Tube, Stainless Steel Decorative Tube, Stainless Steel Electronic Cigarette Tube, Stainless Steel Tube Processing, Copper Pipe , Titanium Alloy Tube , Aluminum Tube , and so on.
