① Hot dip galvanized steel plate. Immerse the steel plate in molten zinc bath to make a layer of zinc adhere to the surface of the steel plate. At present, it is mainly produced by continuous galvanizing process, that is, the rolled steel plate is continuously immersed in zinc bath to make galvanized steel plate.
② Alloy galvanized steel plate. This kind of steel plate is also made by hot dip plating, but it is heated to about 500℃ immediately after it is taken out of the tank to form an alloy film of zinc and iron. This galvanized sheet has good adhesion and paint weldability.
③ Galvanized steel plate. The galvanized steel sheet manufactured by electroplating method has good processability. However, the coating is thin and the corrosion resistance is not as good as that of hot dip galvanized sheet.
④ Single-sided galvanized steel plate and double-sided differential thickness galvanized steel plate. Single-sided galvanized steel plate, that is, a product that is galvanized only on one side. It has better adaptability than double-sided galvanized sheet in welding, painting, antirust treatment and processing. In order to overcome the disadvantage of not coating zinc on one side, there is another kind of galvanized sheet with thin zinc on the other side, that is, double-sided differential galvanized sheet.
⑤ Alloy and composite galvanized steel plate. It is a steel plate made of zinc and other metals such as aluminum, lead and zinc. This steel plate not only has excellent antirust performance, but also has good painting performance.
In addition to the above five kinds, there are colored galvanized steel plates, printed galvanized steel plates and PVC laminated galvanized steel plates. But at present, the most commonly used is hot-dip galvanized sheet.
Main manufacturers and importing countries: ① Main domestic manufacturers: WISCO, Angang, Baosteel Huangshi, MCC Hengtong, Shougang, Pangang, Hangang, Maanshan, Fujian Jing Kai, etc. ; The main foreign producers are Japan, Germany, Russia, France, South Korea, etc.
Cold rolled strip steel is widely used, such as automobile manufacturing, electrical products, rolling stock, aviation, precision instruments, canned food and so on.
Cold-rolled steel plate is the abbreviation of common carbon structural steel cold-rolled sheet, also known as cold-rolled sheet, commonly known as cold plate, sometimes mistakenly written as cold-rolled sheet. The cold plate is a steel plate with a thickness of less than 4mm, which is made of common carbon structural steel hot rolled steel strip by further cold rolling.
Because the normal temperature rolling does not produce scale, the surface quality of the cold plate is good and the dimensional accuracy is high. In addition, its mechanical properties and technological properties are better than hot-rolled steel plates, and it has been gradually used to replace hot-rolled steel plates in many fields, especially in the field of household appliances manufacturing.
Applicable brands: Q 195, Q2 15, Q235 and Q275SPCC (Japanese brands); ST 12 (German brand)