Overview Of The Development Of Cold Rolled Steel Sheets

◆ Strip hot rolling

In the forties and fifties, the first generation, with an annual output of 100 to 2.5 million tons.

In the 1960s, the second generation, with an annual output of 200 to 3.5 million tons.

In the 1970s, the third generation, with an annual output of 3 to 6 million tons.

◆ Strip cold rolling

Generally, the weight of the coil is 40 t, and the individual to 60 t is increased by 30 to 50%.

The main measures to increase productivity, increase the weight of the coil, increase the rolling speed and operating rate.