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首页> 外文期刊>ISIJ international >The Static and Metadynamic Recrystallization Behaviour of an X60 Nb Microalloyed Steel
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The Static and Metadynamic Recrystallization Behaviour of an X60 Nb Microalloyed Steel

机译：X60 Nb微合金钢的静态和超动力学重结晶行为

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摘要

A rapid method has been developed to determine recrystallization kinetics of Nb microalloyed steels by interrupted hot torsion test. The softening behaviour was achieved as a function of different processing parameters. The method clearly identified three regions, where the strain dependency of the recrystallization rate varied. Firstly, at large strains the rate of recrystallization was not a function of strain; this is generally ascribed to metadynamic recrystallization. At lower strains the time to 50 percent recrystallization showed a power low relationship with strain, characteristic of static recrystallization. A further break point exists on the time for 50 percent softening curve when strain induced precipitation occurs in the material. The onset of strain induced precipitation was at strains below the strain to the peak stress at temperatures below 900 deg C. The experimental results were used to estimate the time for 50 percent softening and to anticipate the onset of the strain induced precipitation for the alloy of this study. Grain refinement of the recrystallized austenite continued to strains significantly beyond the peak stress and beyond the static to metadynamic recrystallization rate transition.
机译：已经开发了一种通过中断热扭转试验确定Nb微合金钢再结晶动力学的快速方法。根据不同的加工参数实现了软化行为。该方法清楚地确定了三个区域，其中重结晶速率的应变依赖性变化。首先，在大应变下，再结晶速率不是应变的函数；这通常归因于超动力学重结晶。在较低的应变下，达到50％的再结晶时间显示出与应变的低功率关系，这是静态再结晶的特征。当材料中发生应变诱发的沉淀时，在达到50％软化曲线的时间上还存在一个断裂点。在低于900摄氏度的温度下，应变诱发的析出发生在低于应变至峰值应力的应变下。实验结果用于估算50％软化的时间，并预测合金的应变诱发析出的发生。这项研究。重结晶奥氏体的晶粒细化继续在超过峰值应力和从静态到超动态再结晶速率过渡的过程中产生明显的应变。

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