What is hot rolled steel coil?
Hot rolled steel coil is made of slab (mainly continuous casting slab) as raw material, which is heated and then made into strip steel by roughing mill and finishing mill. Hot rolled steel is a mill process which involves rolling…
Development of hot rolled steel coil (hot strip) production lines in China
The first hot rolled coil production line is the 2800/1700 semi-continuoushot strip millof Angang Steel Company Limited. This production line is imported from the Soviet Union in 1957, and started working in 1958. The finishing rolling line started working in…
The advantages of the hot rolling
Hot rolling can improve the processing performance of metal and alloy, that is, the coarse grain in casting state is broken, the crack is obviously healed, the casting defect is reduced or eliminated, the cast structure is changed into deformed…
What is the hot rolled steel
What is thehot rolled steel?As the name implies, ¡°hot rolled steel¡± refers to the steel rolled by high temperature heating.The rolling process undergoes high temperatures of over 1,000¡ãF, which is above the re-crystallization temperature for most steels. This makes the…
The benefits of the cold rolled steel coils
The hot rolled and cold rolled steel start out as large steel slabs .The basic difference between these two types of steel is one of process. As you can imagine, ¡°hot rolling¡± refers to processing done with heat. ¡°Cold rolling¡±…
Development of cold rolling strip (steel coil) production lines in China
Comparing to other countries, the cold rolling strip production mills are started and developed a little late in China. The begining of cold rolled steel coil production in China is at 1961, Angang steel built the first cold rolled strip…
The production process of the cold rolled steel coil
The production process of cold rolled coil is slightly different according to the variety and specification of raw materials and products. The general process of cold rolled steel coil is introduced as follows. 1.Pickling.A continuous pickling unit is used to…
History of cold rolled 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…
What is the process difference between hot rolling coil production and cold rolling coil production?
The hot rolled coil production and cold rolled coil production are both happened in steel pressing actions. But their production processes are in different principle for different purpose. They are different stage in coil production. 1. The raw material difference:…
History of hot rolling steel coil production line
The first continuous (tandem) rolling coil production line was born in US in 1925. This is the first hot continuous rolling coil mill in the world.From this production line, the hot rolled coil production technology has three phases. 1. Before…