Product Type And Features
Annealing cold-rolling steel plate is a steel plate processed by cold rolling process and annealed in the subsequent process. The cold rolling process refers to the further rolling of hot rolled steel plates to the desired thickness at room temperature. This can improve the dimensional accuracy and surface finish of the steel plate. Annealing treatment is to eliminate the work hardening in the cold rolling process, restore the plasticity and toughness of steel, so as to improve its comprehensive mechanical properties.
| Size | 1. Width: 480~1250mm ;2. Thickness: 0.18~2.0mm ;3. Hardness: T1~T3 . 4. The products can be produced according to the requirements of clients . |
| Technology | Cold Rolling ; |
| Base Material | SPHC / SPHD / SPHE / STW22 / STW24 |
| Application | Electrolytic tin steel plates , tin-less steel plates , Zinc-plating base steel plates , deep-drawing and deep-drawing cold-rolled plates etc . |
| Production Line | Two sets 650mm , two sets 900mm , two sets 1050mm and two sets 1250mm cold-rolling machine groups and finished cold rolled steel plates . |
| Production Capacity | 500,000T / Year |
| Certificates | ISO , SGS , etc . |
| MOQ | 1T |
| Package | Seaworthy Package |
| Price Term | EXW , FOB , CFR , CIF |
| Payment Method | T/T , L/C . |
| Sample | Free sample is available . |
Production Process Of Annealing Cold-rolling Steel Plate
1. Billet preparation
Hot rolled strip steel with a thickness of 1.5 to 6mm is selected as the cold-rolled billet. Before entering the cold rolling production line, these strips need to go through strict quality inspection to ensure that their width, thickness tolerance and plate shape meet the requirements of cold rolling.
2. Pickling
In order to remove the iron oxide scale and dirt and other impurities on the surface of hot rolled strip steel, hydrochloric acid or sulfuric acid and other acid pickling. This step ensures the smooth surface of the strip and creates good conditions for subsequent cold rolling and surface treatment.
3. Cold rolling
At room temperature, the worker would roll the pickled steel strip, thereby reducing its thickness to the desired size. In the cold rolling process, it is necessary to strictly control the rolling force, rolling speed and reducing rate, etc., to ensure the dimensional accuracy and mechanical properties of the strip.
4. Degreasing
Because the surface of the strip will be coated with lubricating oil during the cold rolling process. And the grease will volatilize in the annealing furnace and remain on the surface of the strip to form black spots. It is necessary to degreasing before annealing. The common degreasing method is chemical degreasing, that is, the use of degreasing agent to remove oil.
5. Annealing
Annealing is an important process in the production of cold rolled sheet steel. Its purpose is to eliminate work hardening in cold rolling process, restore the plasticity and toughness of steel plate, and improve the structure and performance of steel plate. The annealing process is usually carried out in protective gas (such as hydrogen, nitrogen, etc.). The determination of temperature setting and holding time directly affects the performance of steel plate.
6. Leveling
Workers need to level the annealed strip to obtain a flat and smooth surface and uniform thickness. In this step, they need to control the leveling force and leveling speed and other parameters to avoid adverse effects on the surface quality and mechanical properties of the strip.
7. Shearing
According to the order requirements, shearing strip, including transverse cutting and longitudinal cutting. Transverse cutting is to cut the strip to the desired width, and longitudinal cutting is to cut the strip to the desired length. After shearing, the cold-rolled annealed steel plate becomes the final product.
Performance Characteristics Of Annealing Cold-rolling Steel Plate
1. Excellent surface quality: after cold rolling and annealing treatment, the surface of cold-rolling steel plate becomes smooth and smooth. It is very suitable for subsequent coating and electroplating process.
2. High dimensional accuracy: in terms of thickness, width and length, this steel plate can achieve high accuracy requirements, to meet the needs of modern industry for high-precision materials.
3. Superior mechanical properties: through cold rolling and annealing process, the steel plate not only has excellent strength, hardness and plasticity, but also can better adjust its mechanical properties through annealing treatment to achieve the required toughness level.
4. Easy processability: it has good stamping, stretching, bending and welding performance, widely used in auto parts, home appliance shell and other products with high processing performance requirements.
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