Abstract：In this paper, steel plate for buildings with high strength and low yield ratio was studied in laboratory. The microstructure of test steel was controlled by proper composition design, controlled rolling and UFC technology in order to increase strength and decrease yield ratio. It has been shown that the composite microstructure of soft phase ( bainite ferrite ) and hard phase ( M/A ) can be obtained when UFC final cooling temperature was about 690℃, and the percentage of M/A component is about 9.2%. The yield strength and tensile strength could meet the requirements of 780 MPa grade, and the yield ratio was about 0.7.
康健 王昭东 王国栋 袁国 周晓光. 780MPa级低屈强比高层建筑用钢的生产工艺研究[J]. 钢铁, 2010, 45(7): 71-71.
KANG Jian zhaodong wang YUAN Guo ZHOU Xiao-Guang. Study on the Production Process of 780MPa Grade Steel Plates with Low Yield Ratio for High-rise Buildings. Iron and Steel, 2010, 45(7): 71-71.
2010, Vol. 45 
