By definition, steel ingots or billets are difficult to deform at room temperature and difficult to process. Generally, they are heated to 1100-1250 °C for rolling. This rolling process is called hot rolling. The temperature of the hot-rolled sheet is high, so the deformation resistance is small, and a large amount of deformation can be achieved.
Taking the rolling of steel plates as an example, the thickness of the continuous casting slab is generally about 230mm, and after rough rolling and finishing rolling, the final thickness is 1~20mm. At the same time, due to the small width-to-thickness ratio of the steel plate, the dimensional accuracy requirements are relatively low, and the plate shape problem is not easy to occur, and the main control is to control the crown.
Type of use
1. Structural steel
Mainly used in the production of steel structure parts, bridges, ships and vehicles.
2. Weathering steel
Add special elements (P, Cu, C, etc.), with good corrosion resistance and atmospheric corrosion resistance, used in the production of containers, special vehicles, and also used in building structures.
3. Steel for automobile structure
High-strength steel plate with good stamping performance and welding performance, used in the production of automobile FRAME, WHEEL, etc.
4. Hot-rolled special steel
Carbon steel, alloy steel and tool steel for general mechanical structures are used in the production of various mechanical parts after heat treatment.
5. Cold rolled original plate
It is used to produce various cold rolled products, including CR, GI, color-coated sheet, etc.
6. Steel plate for steel pipe
With good processing performance and compressive strength, it is used to produce high-pressure gas pressure vessels filled with LPG, acetylene gas and various gases with an inner volume of less than 500L.
7. Steel plates for high pressure vessels
With good processing performance and compressive strength, it is used to produce high-pressure gas pressure vessels filled with LPG, acetylene gas and various gases with an inner volume of less than 500L.
8. Stainless steel plate
Stainless steel has good corrosion resistance and is mainly used in the food industry, surgical equipment, aerospace, petroleum, chemical and other industries.
