Nb-Ti微合金高强度钢1.5mm冷轧板退火组织和第二相析出行为  

Precipitate Behavior of Second Phase and Structure of Annealed 1.5mm Cold Rolling Sheet of Nb-Ti Microalloy High Strength Steel

作　　者：刘浩[1] 陈晓[1] 李平和[2] 郑红[2] 吴青松[2] 刘清友[3] 

机构地区：[1]武汉科技大学材料与冶金学院,武汉430081 [2]武汉钢铁公司技术中心,武汉430080 [3]钢铁研究总院,北京100081

出　　处：《特殊钢》2006年第3期26-28,共3页Special Steel

摘　　要：用透射电镜实验研究了（％）：0．08C-1．0Mn-Nb＋Ti〈0．10微合金高强度钢经53％冷变形1．5mm板6．50℃和680℃退火的组织和第二相析出行为。结果表明，试验钢中的第二相为（Ti，Nb）（C，N）复合析出相，第二相粒子尺寸一般为20—30nm，随退火温度提高。第二相粒子的数量增加。由于退火过程第二相析出强化和第二相粒子抑制晶粒长大，使钢中晶粒细小，该钢650℃退火组织具有较高强度（屈服强度≥480MPa）。The precipitate behavior of second phase and structure of 0.08C-1.0Mn-Nb ＋ Ti 〈 0.10 microalloy high strength steel 1.5 mm sheet deformed by 53 % annealed at 650℃ and 680℃ has been tested and studied by transmission electron microscope, the results showed that the second phase in test steel was （Ti,Nb） （C,N） compound precipitate phase, generally the size of second phase particles was 20 ～ 30 nm, and with increasing annealing temperature the amount of second phase increased. The higher strength （yield strength ≥480MPa at 650℃） is due to second phase precipitate strength and inhabiting gain growth to form fine grain.

关 键 词：冷轧 Nb-Ti微合金化 高强度钢 第二相析出 组织 

分 类 号：TG335.12[金属学及工艺—金属压力加工]