Effects of rolling processes on Bainite and Mechanical Properties of Ultra-high Strength Pipeline Steel
Ultra-high strength pipeline steels were rolled by thermal mechanical controlling process (TMCP), and effects of the volume fraction, the size and microstructure morphologies of three different bainite (AF, GB and LB) on mechanical properties were investigated by optical microscope. The results showed that, X120 ultra-high strength pipeline steel was rolled through the reasonable thermal mechanical controlling process (TMCP), and the yield strength and the low temperature charpy impact energy (-30℃ ) were higher than 840MPa and above 230J,respectively, meanwhile, the ratios of tensile strength to yield strength were lower below 0.82. As for X100 pipeline, of which the mechanical property were higher than that by X100 pipeline steel of ISO standard, yield strength of the steel was 715 MPa, ultimate tensile strength 963 MPa, impact energy 282J, and yield ratio 0.74.
ultra-high strength pipeline steel bainite TMCP mechanical properties
ZHANG Kai ZHAO Yu QIU Chun-lin LI Si-jun DU Lin-xiu WU Di
State Key Laboratory of Rolling & Automation, Northeastern University, Shenyang 110004, Liaoning, Ch School of Materials, Shenyang University of Technology, Shenyang 110870, Liaoning, China The Technology Research and Development Center of Laiwu Iron and Steel Group Co., Ltd., Laiwu 271104
国际会议
The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)
北京
英文
564-567
2011-05-31（万方平台首次上网日期，不代表论文的发表时间）