The precipitation of NbC _x N_1−x significantly affects the high-temperature mechanical properties of Nb microalloyed steel. The control of the precipitation behaviour of NbC _x N_1−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 N_1−x through thermodynamic model, chemical phase analysis, XRD and TEM. The modelling research show that electropulsing intensity significantly promotes the nucleation of NbC _x N_1−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 N_1−x by 50% at 950°C compared to the precipitation without electropulsing.

NbC _x N _{1- x}的析出会显着影响Nb微合金钢的高温机械性能。NbC _x N _{1- x}的析出行为的控制是关键，尤其是Nb固溶体的成核和析出。我们探索利用电脉冲通过热力学模型，化学相分析，XRD和TEM促进NbC _x N _{1- x}的沉淀。建模研究表明，电脉冲强度显着促进了NbC _x N _{1− x}的成核 在奥氏体相。脉冲温度越高，促进效果越好。化学相分析和XRD研究结果表明，与没有电脉冲的沉淀相比，电脉冲可以在950°C下将NbC _x N _{1- x}的沉淀量增加50％。