hot rolled

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.