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首页> 外文期刊>ISIJ international >Incomplete Recrystallization and Subsequent Microstructural Evolution during Intercritical Annealing in Cold-rolled Low Carbon Steels
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Incomplete Recrystallization and Subsequent Microstructural Evolution during Intercritical Annealing in Cold-rolled Low Carbon Steels

机译：冷轧低碳钢在临界退火过程中不完全重结晶和随后的组织演变

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Microstructural evolution during intercritical annealing after rapid heating of cold rolled low carbon steels was investigated by EBSD and TEM. When the specimens were heated to above the Ac_(1) temperature before the completion of the primary recrystallization of α and then annealed, remarkable retardation of the primary recrystallization was observed, resulting in non-uniform grain size distribution of α. Because of the retardation, subgrains formed in non-recrystallized α are not consumed by recrystallized α and are thus able to gradually grow with annealing, and finally the grain size distribution of α becomes uniform. The analysis based on the r~(n) ?r _(0~(n) )=kt equation has shown that the subgrain growth in non-recrystallized α from the holding period of 100 to 1000 s follows n =3, indicating that the subgrain growth is controlled by the volume diffusion of Mn at α and γ interfaces. The transition of n from 3 to 2, observed at the holding time of longer than 1000 s, may be due to the gradual disappearance of the smaller γ phase at subgrain boundaries.
机译：通过EBSD和TEM研究了冷轧低碳钢快速加热后的临界退火过程中的组织演变。当样品在α的初次结晶完成之前加热到Ac_（1）温度以上，然后退火时，观察到明显的延迟，这导致α的晶粒尺寸分布不均匀。由于该延迟，未重结晶的α中形成的亚晶粒不会被重结晶的α消耗，因此能够随着退火而逐渐生长，最终α的粒度分布变得均匀。根据 r〜（n）？ r _（0 〜（n））= kt方程的分析表明，从保持期开始，未重结晶的α中的亚晶粒长大n = 3之后，在100至1000 s内变化，表明亚晶粒的生长受Mn在α和γ界面处的体积扩散控制。在长于1000 s的保持时间内观察到的n从3到2的转变，可能是由于较小的γ相在亚晶界处逐渐消失所致。

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