Influence of precision rolling mill temperature
The uniform heating of the rolling stock is the premise of ensuring the dimensional accuracy of the rolling material. In order to avoid the black mark on the slideway of the heating furnace, the use of an excellent walking furnace and an excellent heating system are the key to solving this problem.

Even if the rolled piece is heated evenly in the heating furnace, the rolling time in the subsequent rolling mill is too long, and the temperature difference between the head and the tail is too large, which will also affect the dimensional accuracy. There is a problem, due to the long rolling time and low rolling speed of the tandem mill, the impact in this regard will be greater. This problem also exists in semi-continuous rolling mills. For example, in the special steel workshop of Krupp Steel Company in West Germany, in order to solve the difficult problem in the production of high alloy steel – the temperature drop of the rolled material before entering the continuous rolling mill, in the open roughing mill The medium frequency induction reheating equipment is installed between the tandem mill and the equipment is installed to produce heavier coils, reduce decarburization and reduce dimensional deviations. With this medium frequency induction heating equipment with a power of 2300KW, 3KHz, and a very small feeding speed of 0.5m/s, the billet can be kept at a constant temperature from the beginning to the end when it enters the continuous rolling mill, and the tail of the billet can be heated from 750 ℃ to 1050 ℃, The surface temperature of any point of the billet head does not exceed the specified temperature range of 1200 ° C. The length of this heating equipment is 7.5m. It can be installed in front of the continuous rolling mill to reduce the heating temperature of the stepping furnace. However, due to the decrease in the power consumption of the continuous rolling mill, the power consumption of the whole workshop has not increased, but has decreased slightly, which ensures the reliability of high-alloy steel rolling, and improves the quality and dimensional accuracy.

In addition to solving the heating problem itself, the layout of the precision wire cold rolling mill also has a certain impact. At present, countries around the world are vigorously developing precision wire rolling mills in close proximity, increasing rolling speed, shortening rolling cycle, and reducing the temperature drop of the rolled piece, which can reduce the rolling temperature, and can also ensure small temperature difference between head and tail, high dimensional accuracy, and uniform mechanical properties.