The precipitation of NbC x N1−x significantly affects the high-temperature mechanical properties of Nb microalloyed steel. The control of the precipitation behaviour of NbC x N1−x is the key, especially the nucleation and precipitation from Nb solid solution. We explore to use electropulsing to promote the precipitation of NbC x N1−x through thermodynamic model, chemical phase analysis, XRD and TEM. The modelling research show that electropulsing intensity significantly promotes the nucleation of NbC x N1−x in austenite phase. The higher the electropulsing temperature is, the better the promotion effect is. The chemical phase analysis and XRD investigation results show that electropulsing can increase the amount of precipitation of NbC x N1−x by 50% at 950°C compared to the precipitation without electropulsing.

中文翻译：

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电脉冲对奥氏体相中 NbC x N1-x 析出的影响

NbC x N1-x 的析出显着影响 Nb 微合金钢的高温力学性能。NbC x N1-x 析出行为的控制是关键，尤其是 Nb 固溶体的成核和析出。我们通过热力学模型、化学相分析、XRD 和 TEM 探索使用电脉冲促进 NbC x N1-x 的析出。建模研究表明，电脉冲强度显着促进了奥氏体相中 NbC x N1-x 的形核。电脉冲温度越高，促进效果越好。化学物相分析和 XRD 研究结果表明，与没有电脉冲的沉淀相比，电脉冲在 950°C 下可以使 NbC x N1-x 的沉淀量增加 50%。