STRENGTHENING MECHANISMS OF V-Ti-Mo MICROALLOYED 900MPa HOT-ROLLED FERRITIC STEEL
A new V-Ti-Mo complex micro-alloyed hot-rolled high strength sheet steel was developed by controlling a thermomechanical controlled processing(TMCP)schedule,in particular with variants in coiling temperature.At coiling temperature of 600,the experimental steel has the best mechanical properties: ultimate tensile strength(UTS)1000 MPa,yield strength(YS)955 MPa and elongation(EL)17%.Furthermore,the contributions of precipitation hardening and grain refinement hardening were high to about 310 and 361 MPa,respectively.The steels developed were mainly strengthened by a combined effect of ferrite grain refinement hardening and precipitation hardening.The variation in contribution of precipitation hardening increment caused a significant difference in YS.
Hot-rolled ferritic steel Strengthening mechanism Nano-sized carbide Precipitation hardening Coiling temperature
Ke ZHANG Zhaodong LI Xiaochen HAN Xinjun SUN Qilong YONG
School of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650 Institute of Structural Steels,Central Iron and Steel Research Institute,Beijing 100081
国内会议
杭州
英文
379-385
2015-11-11（万方平台首次上网日期，不代表论文的发表时间）