Rolling mill

The process of rolling hot strip with thickness of 1.2 ~ 8mm on hot strip mill. Strip width below 600mm is called narrow strip; Over 600mm is called wide strip. The first hot strip mill went into operation in the United States in 1905, producing strips 200mm wide. The technical and economic indexes of hot strip mill are superior and the development is fast. In industrially developed countries, the output of hot rolled wide strip steel accounted for about 25% of the total steel output before 1950, and had reached about 50% in the 1970s. The raw material of hot rolled strip is continuous casting slab or first rolled slab, the thickness is 130 ~ 300mm. After the slab is heated in the heating furnace, it is sent to the rolling mill to be rolled into strips with a thickness of 1.00 ~ 25.4mm and rolled into steel coils. The rolled steel is common carbon steel, low alloy steel, stainless steel and silicon steel. Its main use is as raw material for cold rolled strip steel, welded pipe, cold bending and welded section steel; Or for the production of various structural parts, containers, etc.

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Hot rolling steel plate products have high strength, good toughness, easy processing and forming and good weldability and other excellent properties, so the north is widely used in ships, automobiles, Bridges, construction, machinery, pressure vessels and other manufacturing industries. Hot continuous rolling steel plate products, a wide variety of steel specifications, a wide range of uses, from the general engineering structure to the automobile, bridge, ship, boiler pressure vessel and other manufacturing, have been widely used. All kinds of different uses, the material performance of steel plate, surface quality and size, shape accuracy and other requirements are also different, therefore, must be on the hot rolled steel plate products variety, material, characteristics and use of some understanding, in order to achieve economic and rational use.