控温大应变孔型轧制纤维细晶钢增韧机理的研究进展  

Strengthening mechanism research development of fibrous refined grained steels by warm and large strain caliber rolling

作　　者：刘宝玺 樊宽远[1,2,3] 冯建航 张昕 殷福星[1,2,3] LIU Bao-xi;FAN Kuan-yuan;FENG Jian-hang;ZHANG Xin;YIN Fu-xing(School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300132,China;Research Institute for Energy Equipment Materials,Hebei University of Technology,Tianjin 300132,China;Tianjin Key Laboratory of Materials Laminating Fabrication and Interfacial Controlling Technology,Hebei University of Technology,Tianjin 300132,China)

机构地区：[1]河北工业大学材料学院,天津300132 [2]河北工业大学能源装备材料技术研究院,天津300132 [3]河北工业大学天津市材料层状复合与界面控制重点实验室,天津300132

出　　处：《轧钢》2020年第5期57-63,共7页Steel Rolling

基　　金：河北省高等学校高层次人才科学研究项目(GCC2014012);国家自然科学基金资助项目(51601055,U1860114);河北省青年基金资助项目(E201620218)。

摘　　要：孔型轧制纤维细晶钢是日本国立物质材料研究所于2003年研制成功的高强高韧钢铁材料,在受到强大冲击载荷时,断裂路径通过多重脱层断裂方式,能做到“打断骨头连着筋”的增韧效果。系统介绍了控温大应变孔型轧制纤维细晶钢的制备流程,纤维状细小晶粒组织和纤维织构的形成机理,以及冲击过程中的裂纹扩展路径。阐明了孔型轧制过程中温度和压下量对纤维细晶钢组织和力学性能的影响规律,总结了其在冲击和拉伸过程的增韧方式,以及韧脆转变过程中所表现出的逆温度效应,这种多尺度组织和似“筷子折断”式断裂方式为金属材料的强韧化提供了理论基础和实验支撑。Caliber rolled steel with fibrous refined grain is the novel materials with super-high strength and high toughness,which was invented by National Institute for Materials Science(NIMS)in 2003.Under the powerful impact loading,the fracture propagation path reveals superior toughening effect by multiple delamination cracks,which is similar to that bones may be broken but not sinews.The fabrication process of fibrous refined grained steels by warm caliber rolling,the formation mechanism of fibrous refined grains and fibrous texture,and the crack propagation path were systematically introduced.The effect of caliber rolling temperature,caliber rolling reduction ratio on the microstructure and mechanical properties of fibrous refined grained steels were described.Finally,the toughening mechanism during impact and tensile process,as well as the inverse temperature effect during ductile-brittle transition process were concluded in detail.The multiscale hierarchical microstructure and chopstrick broken fracture characteristics could be beneficial to providing theoretical basis and experimental support for strengthening and toughening of metals.

关 键 词：纤维细晶钢 控温孔型轧制 纤维织构 增韧方式 逆温度效应 

分 类 号：TG335.1[金属学及工艺—金属压力加工]