【作者】 杨雄飞； 于浩； 陈兵华； 程兴德；

【Author】 YANG Xiongfei 1 YU Hao 2 Cheng Binghua 1 cheng Xingde 2 1.PanGang Group Research Institute Co.,Ltd.,State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000,Sichuan,China 2.School of Materials Science and Engineering,University of Science and Technology,Beijing 100083,China

【机构】 攀钢集团研究院有限公司,钒钛资源综合利用国家重点实验室； 北京科技大学材料科学与工程学院；

【摘要】 为了降低传统Nb-V复合微合金化Q460建筑用钢板的合金加入量和成本,利用第三代TMCP技术和V-N微合金化技术,设计出0.06-0.08%V、不含Nb成分的HSLA钢种,并通过合理的控轧控冷工艺设计,成功地开发出厚度规格50mm的VN微合金化Q460GJC钢板,产品屈服强度大于470MPa,0℃冲击韧性超过150J,屈强比仅为0.8。理论计算表明细晶强化和析出强化对新开发钢中的屈服强度贡献达到66%。更多还原

【Abstract】 For the purpose of reducing alloys additions and then its cost of conventionally combined Nb-V microalloyed Q460 grade steel plates for construction,a HSLA steel alloying design with only V-N microalloying of 0.06-0.08%V and free of niobium,and corresponding thermal mechanical controlled process were facilitated by better understanding the third generation TMCP concept and V-N microalloying technology.These resulted in successfully commercializing gauge 50mm V-N microalloyed Q460GJC steel plates with good combination of high strength >470MPa and improved toughness of Akv@0℃>150 J,and low YS/UST ratio of 80% as well.Theoretical calculation indicated that the contribution by fined-grain and precipitate strengthening amount to -66% of yield strength of the newly developed plate steels.更多还原