1. Different base materials
The introduction of ordinary cold-rolled plate is a product obtained from hot-rolled bai sheet through cold press processing. Due to the multi-pass cold rolling, its surface quality is better than that of hot-rolled sheet. After heat treatment, good mechanical properties can be obtained.
2. Different physical properties
Hot-dip
galvanized coil steel is more corrosion resistant than cold-rolled steel. The characteristics of hot-dip galvanized coil steel are strong corrosion resistance, good surface quality, good for deep processing, economical and practical. The drawing performance of hot-dip galvanized steel is not as reliable as cold-rolled steel. Hot-dip galvanized steel is not as easy to weld as cold-rolled steel, and the zinc layer is destroyed during welding.
3. The physical characteristics of the surface are different
One is galvanized white and the other is black. The hardness is about the same, and the performance is relatively large. Generally, the galvanized sheet is not processed after processing, because the base surface has better oxidizing properties, while the cold-rolled sheet is not good. You must paint the surface otherwise. Oxidation.
4. Different processes
Since the cold-rolled sheet is not heated during the production process, there are no defects such as pitting and scale that often occur in hot rolling, and the surface quality is good and the smoothness is high. Moreover, the dimensional accuracy of cold-rolled products is high, and the performance and organization of the products can meet some special requirements, such as electromagnetic properties and deep drawing properties. Galvanized sheet refers to a steel sheet coated with a layer of zinc on the surface. Galvanizing is an economical and effective anti-rust method that is often used. About half of the world's zinc production is used in this process.
