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首页> 外文期刊>ISIJ international >Hot deformation and recrystallization of 3 percent silicon steel part 3: Effect of hot deformation variables on static recrystallization
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Hot deformation and recrystallization of 3 percent silicon steel part 3: Effect of hot deformation variables on static recrystallization

机译：3％硅钢的热变形和再结晶第3部分：热变形变量对静态再结晶的影响

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摘要

The static recrystallization kinetics and the recrystallized grain size of 3 percent Si steel after hot rolling at temperatures of 900 to 1 100 deg C to equivalent strains of 0.25 to 1.24 applied in a single pass or by two pass rolling have been investigated. When the annealing temperature was changed for a constant rolling temperature, an apparent activation energy of 230kJ/mol, and a small increase in recrystallized grain size with increase in annealing temperature were found. Rolling at different temperatures had a surprisingly small effect. The growth rate of recrystallizing regions showed a rapid decrease with annealing time, being inversely proportional to time initially, but decreasing more rapidly at longer times. For conditions leading to long recrstallization times, growth rate fell to zero, resulting in plateaux in fraction recrystallized. Increase in equivalent strain accelerated recrystallization, but the effect after two pass rolling is complicated by a change in rolling direction between the passes. The majority of results can be interpreted by a simple model based on site saturated nucleation and negligible coarsening of recrystallized grains, but smaller strains in single pass rolling, or in the second pass of two pass rolling give large discrepancies with the model.
机译：研究了在900到1100摄氏度的温度下热轧到0.25到1.24的等效应变为0.25到1.24的热轧后的静态再结晶动力学和3％Si钢的再结晶晶粒尺寸。当将退火温度改变为恒定的轧制温度时，发现表观活化能为230kJ / mol，并且随着退火温度的升高，再结晶晶粒尺寸的增加很小。在不同温度下轧制的效果出乎意料地小。重结晶区的生长速率随着退火时间的增加而迅速降低，最初与时间成反比，但随着时间的延长，其降低速度更快。对于导致重新结晶时间长的条件，生长速率降至零，从而导致馏分中的平台重结晶。当量应变的增加促进了再结晶，但是两次道次轧制后的效果由于道次之间轧制方向的改变而变得复杂。大多数结果可以通过基于位点饱和成核和可忽略不计的再结晶晶粒的简单模型来解释，但是在单道次轧制或两次道次轧制的第二道次中应变较小，与该模型存在较大差异。

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