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首页> 外文期刊>ISIJ international >Role of Nb on Microstructural Evolution during Intercritical Annealing in Low-carbon Steels
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Role of Nb on Microstructural Evolution during Intercritical Annealing in Low-carbon Steels

机译：Nb在低碳钢的临界退火中对微观组织演变的作用

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We investigated the microstructural evolution during intercritical annealing in Nb-added low-carbon steels, focusing on the synergistic effects of the addition of Nb and the ferrite (α ) to austenite (γ ) phase transformation on the recrystallization behavior of α . Two kinds of specimens, containing 0.02 and 0.05 mass% Nb, were prepared and annealed at the intercritical temperature (750°C) for a long time. The progress of recovery and α recrystallization was retarded by increasing the amount of Nb addition during intercritical annealing. Moreover, the progress of α recrystallization during intercritical annealing was mainly attributed to continuous recrystallization due to subgrain growth. The fraction of γ that formed during intercritical annealing increased owing to Nb addition, but it did not increase with increasing amount of Nb addition. These results suggest that the progress of recovery and α recrystallization was retarded during intercritical annealing by the addition of Nb, thereby causing the increase in γ fraction. Furthermore, the increase in γ fraction led to further retardation of α recrystallization and α refinement with the addition of Nb.
机译：我们研究了添加铌的低碳钢在临界退火过程中的显微组织演变，重点研究了添加铌和奥氏体（γ）的铁素体（α）相变对再结晶行为的协同作用。的α。制备了两种试样，分别含有0.02和0.05质量％的Nb，并在临界温度（750℃）下长时间退火。通过在临界退火期间增加Nb的添加量，阻碍了恢复和αi重结晶的进程。而且，在临界退火期间的α再结晶的进展主要归因于亚晶粒生长导致的连续再结晶。由于Nb的添加，在临界退火期间形成的γ的分数增加，但是随着Nb的添加量的增加而没有增加。这些结果表明，在临界退火中，通过添加Nb，阻碍了恢复和iα的再结晶的进行，从而导致γi分数的增加。此外，随着Nb的添加，γ分数的增加导致α再结晶的进一步延迟和α细化。

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