CSP冷轧低碳钢板再结晶晶粒长大阶段微区织构的研究

Investigation on micro-texture during grain growth in low-carbon steel sheet based on CSP technology

利用电子背散射衍射(EBSD)技术研究了CSP冷轧低碳钢板再结晶晶粒长大阶段组织和微区织构的变化。结果表明具有{111}取向晶粒的数量和尺寸在再结晶刚完成时都具有很大的优势,并一直保持到退火完成。这是再结晶织构中γ取向线密度很高的一个重要原因。但是{111}晶粒的生长在晶粒长大后期停滞,造成了γ取向线密度的下降。晶粒长大动力学的差异对应着取向差的变化,{111}晶粒生长的停滞可以用{111}晶粒同周围晶粒取向差的减小来解释。

The microstructure and micro-texture of low-carbon steel sheet produced by CSP technology during grain growth were investigated by electron back scatter diffraction（EBSD）.The results show that {111} grains have great advantages in both amount and size just after recrystallization.Such advantages is maintained to the end of the annealing process,which results in a high density γ-fiber in the recrystallization texture.However,the growth of the {111} grains stagnates in the later stage of the grain coarsening.It results in a decrease of density of γ-fiber.The difference of the growth kinetics corresponds to the change of the misorientation.The stagnation of the {111} grain growth can be explained by the decrease of the misorientation among grains around it.