Views:0 Author:Site Editor Publish Time: 2021-03-31 Origin:Site
The base material of color coating is galvanized sheet, the base material of galvanized sheet is hard-rolled coil, and the base material of hard-rolled coil is hot-rolled coil. Hot rolled coil grades currently suitable for the production of color coated substrates: SPHC, SPHD, SPHE; Q195, Q195L, Q235; SAE1022, SAE1018, SAE1015, IF. The above grades correspond to different color-coated board applications, such as high-strength boards for large-span structures; medium-strength boards with high elongation; compression-shaped boards with larger elongation; deep-drawn boards with better elongation. The selection of raw materials and the fusion of galvanizing process can ensure the quality of color-coated substrates.
①Hot-dip galvanized steel sheet.
The thin steel plate is immersed in the molten zinc tank, so that a thin steel plate with a layer of zinc is adhered to the surface. At present, the continuous galvanizing process is mainly used for production, that is, the rolled steel sheet is continuously immersed in the galvanized bath with molten zinc to make the galvanized steel sheet;
②Alloyed galvanized steel sheet.
This kind of steel plate is also manufactured by hot dipping method, but after it is out of the tank, it is heated to about 500 ℃ immediately to form an alloy film of zinc and iron. This kind of galvanized sheet has good paint adhesion and weldability;
③Electro-galvanized steel sheet.
The galvanized steel sheet produced by the electroplating method has good workability. However, the coating is thinner, and the corrosion resistance is not as good as the hot-dip galvanized sheet;
④Single-sided and double-sided differential galvanized steel sheet.
Single-sided galvanized steel sheet is a product that is galvanized on one side only. In welding, painting, anti-rust treatment, processing, etc., it has better adaptability than double-sided galvanized sheet. In order to overcome the shortcomings of uncoated zinc on one side, there is another kind of galvanized sheet coated with a thin layer of zinc on the other side, that is, double-sided differential galvanized sheet;
⑤Alloy and composite galvanized steel sheet.
It is made of zinc and other metals such as aluminum, lead, zinc, etc. to make alloys or even composite plated steel plates. This kind of steel plate not only has excellent anti-rust performance, but also has good coating performance;
Galvanized sheet is more corrosion resistant than cold-rolled sheet. Galvanized sheet has strong corrosion resistance, good surface quality, is conducive to deep processing, economical and practical. The drawing performance of galvanized sheet is not as reliable as cold-rolled sheet. Galvanized sheet is not as easy as cold-rolled steel sheet Welding, the zinc layer is destroyed during welding.