Hot-rolled steel sheet manufacturing process by hot-rolling process control

摘要

Carbon steel is hot-cooled, control-cooled from cooling start temperature of 800-900 deg.C to coiling temperature of 300-600 deg.C at the cooling rate of 10-100 deg.C/sec, and air-cooled. The steel comprises (in wt.%) 0.05-0.20 C, 0.1-1.5 Mn, 0.01-0.3 Si, 0.001-0.09 Sol, Al, 0.001-0.04 P, 0.001-0.04 S and balance Fe.