超快速退火对Nb+Ti-IF钢组织和织构的影响  

Microstructure and Texture of Nb+Ti-IF Steels After Ultra-short Annealing

作　　者：侯自勇[1] 许云波[1] 吴迪[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,沈阳110819

出　　处：《材料研究学报》2012年第1期13-20,共8页Chinese Journal of Materials Research

基　　金：国家自然科学基金(50734001;50971039);国家重点基础研究发展计划2011CB606306资助项目~~

摘　　要：研究了超快速退火对一种冷轧变形量为94.2%的Nb+Ti-IF钢的微观组织和织构的影响。结果表明:超快速退火(升温速度为300℃/s)提高了钢的再结晶完成温度,整个再结晶退火可在短至0.41 s内完成。与普通退火(升温速度为20℃/s)后钢的再结晶组织相比,超快速退火处理后晶粒平均尺寸由12.98μm细化到10.12μm,晶粒长大速度由～3μm/s提高到～23μm/s,且再结晶晶粒内存在大量缠结位错。在极短时间内,超快速退火再结晶织构仍以均匀、锋锐的{111}//ND有利深冲性能的γ织构为主,且避免了其它α织构的生成,有利于使退火板具有良好的成形性能。The effect of ultra-short annealing process on microstructural and textural evolutions associated with an Nb＋Ti-IF steel sheet with cold reduction of 94.2% was investigated. The results show that the well-recrystallized samples have been obtained in several seconds during the ultra short annealing cycle with higher heating rate up to 300 C/s. In the fully recrystallized condition, the finer grain size and the higher growth velocity, 10.12 #m and 23μ m/s, respectively, can be found in an ultra-short annealing cycle than that in the conventional annealing with heating rate of 20 C/s, 12.98 #m and 3 μm/s, respectively, while also amounts of dislocations in recrystal grain have been observed. The characteristic more homogeneous {111} deep drawing fiber of cold rolled IF steels and other fiber texture nearby a skeleton absent, which is potential for high strength steel with deep drawing, were observed in an annealing treatment as short as 0.41 s.

关 键 词：金属材料 NB+TI-IF钢 超快速退火 晶粒尺寸 织构 

分 类 号：TG142[一般工业技术—材料科学与工程]