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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >The effect of Nb on recrystallization behavior of a Nb micro-alloyed steel
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The effect of Nb on recrystallization behavior of a Nb micro-alloyed steel

机译：Nb对Nb微合金钢再结晶行为的影响

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摘要

By the analysis of true stress-strain curves and the observation of microstructures at different deformation stages, the dynamic recrystallization (DRX) of a Nb micro-alloyed steel and a plain carbon steel is studied, and the critical stress and critical strain are determined under different deformation conditions. By the method of stress relaxation, the post-dynamic recrystallization of two steels is studied. The energy to induce recrystallization of austenite of Nb steel is higher than that of the plain carbon steel. The critical stress of DRX for Nb steel is higher than that for the carbon steel. The apparent activation energy of static recrystallization Q_(srx) of Nb steel and the plain carbon steel is 318 and 231 kJ/mol, respectively. It is obvious that Nb in solid solution increases the value of apparent activation energy (Q_(srx)) dramatically. The precipitation and recrystallization are in competition because of stored deformation energy. The work shows that the ratios of ε_p to ε_c and that of ε~* to ε_c are 1.6 and 2.2, respectively, for the steels.
机译：通过对真实应力-应变曲线的分析和不同变形阶段显微组织的观察，研究了Nb微合金钢和普通碳素钢的动态再结晶（DRX），确定了临界应力和临界应变。不同的变形条件。通过应力松弛的方法，研究了两种钢的动态后再结晶。引起Nb钢奥氏体再结晶的能量高于普通碳素钢。 Nb钢的DRX的临界应力高于碳钢的临界应力。 Nb钢和普通碳钢的静态再结晶Q_（srx）的表观活化能分别为318 kJ / mol和231 kJ / mol。显然，固溶态的Nb显着增加了表观活化能（Q_（srx））的值。由于储存了变形能，沉淀和重结晶处于竞争状态。工作表明，对于钢，ε_p与ε_c的比率以及ε〜*与ε_c的比率分别为1.6和2.2。

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