Ultra Fast Cooling on Baotou CSP Line and Development of 590 MPa Grade C-Mn Low-Cost Hot-Rolled Dual Phase Steel
WANG Guo-dong1,LIU Xiang-hua1,SUN Li-gang2,LIU Zhe2,LIU De-qin2 1.The State Key Lab of Rolling and Automation,Northeastern University,Shenyang 110004,Liaoning,China;2.Compact Strip Production Plant,Baotou Steel Union Co.,Ltd.,Baotou 014010,Neimenggu,China
The parameters and operation of the ultra fast cooling system in Baotou CSP line are introduced.590 MPa grade low-cost C-Mn dual phase steel strips of 4-11 mm in thickness were developed by using laminar and ultra fast cooling process.The main mechanical properties are:tensile strength 590-620 MPa,yield ratio 0.62-0.67,elongation 26-36 and then value of 0.21.The effects of ultra fast cooling on the structure of dual phase steel strip are analyzed.
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