History of cold rolling steel coil production line

Cold rolling of steel began in Germany in the mid-19th century, only 20--25mm wide cold rolled strip steel could be produced in that time.The 25 mm cold rolled strip mill was established in the United States in 1859, and a low carbon steel strip with a width of 150mm was produced in 1887.After 1880, the production of cold rolled steel strip developed rapidly in Germany and the United States. The width of the product expanded continuously. And  the ancillary equipments, such as shear, straightening, leveling and heat treatment equipment, was gradually established. The product quality also improved.

Cold rolled coil (strip) is developed on the basis of hot rolled strip.The first cold rolled  strip steel was rolled in the United States as early as 1920, and it soon passed from single irreversible rolling to single reversible rolling.1926 four stand cold tandem mill was built in amco butler plant.The Soviet union started cold rolling production in the mid-1930s. The first cold rolling workshop was built in the ilyich metallurgical plant.In 1938, the company started to install the three-stand 1680mm 680mm reversible cold rolling mill imported from abroad, producing steel plates with thickness of 0.5~ 2.5mm and width of 1500mm.Later, in order to meet the needs of the automotive industry, the factory set up a 218 mm reversible cold mill.In 1951, the Soviet union built a set of 2030mm continuous five-stand cold rolling mill with an annual output of 2.5 million tons, which was installed in xinli petzk.In 1938, Japan installed the first reversible cold rolling mill at the panasonic plant of toyo steel plate to start the production of cold rolled sheet.In 1940, the first set of four 1420 mm tandem cold mill was established in Nippon steel plant.

The cold rolled steel production line began in 1960 in China. First,the 1700 mm frame reversing mill was established, and then established the 1200 mm single reversing cold rolling mill, partial eight MKW1400 mm mill twenty high cold rolling mill, 1150 mm and 1250 mm HC standalone reversing cold rolling mill, etc., In the 70 s ,China first set of 1700 mm continuous five-stand cold rolling mill. In the 1988, 2030 five-stand continuous cold rolling mill was established. At present, there are 18 wide strip mills and 418 narrow strip mills in China.

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