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What are the differences between cold rolled coil and hot rolled coil?


Cold-rolled coils and hot-rolled coils are both coils, but the difference is still large. Generally speaking, cold-rolled coils are made of hot-rolled coils as raw materials and rolled at room temperature below the recrystallization temperature. Includes plates and rolls. Hot-rolled coil: It takes slab as raw material, and after heating, it is made into strip steel by rough rolling mill and finishing mill.

In terms of accuracy, the thickness of cold-rolled strip is thinner than that of hot-rolled strip, and the accuracy is more accurate. Accurate to one decimal place. In terms of size, the thickness of cold-rolled coil can be made into 0.001 mm steel strip. Compared with hot rolling, the surface quality of cold rolling is even better, and cold rolled strip can now produce a mirror surface.

In fact, the difference between the two rolled sheets is very simple, and we can detect the difference by hand. The surface of the cold-rolled coil has a certain gloss and feels relatively smooth to the touch, and it feels a bit like the steel cup we often use to drink water. However, if the hot-rolled coil has not been pickled, its appearance and feel are very similar to those of ordinary steel sheets in the market.

The advantage of cold-rolled coil is that its surface quality and size accuracy are very high. After the combination of cold-rolling deformation and heat treatment, it can not only easily meet the requirements of users for various product specifications and comprehensive functions, but also has special It is beneficial to produce some important products with special texture and function.


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