重轨钢中稀土与铌的交互作用规律的研究

Interaction of the rare earth and Nb in heavy rail steel

Nb和RE元素对钢的性能均有重要影响.通过不同组分下对热轧后重轨钢中Nb的析出形态的透射电镜和扫描电镜的试样分析,讨论了稀土残留在重轨中对碳化铌的形状、大小及分布的影响.分析结果表明,稀土残留在钢中,使碳化铌尺寸减小,仍沿轧制方向分布,形状由矩形变为不规则形状.

Both Nb and Re element have important impact on the properties of steel. Rolling samples of different content of Nb and Re have been investigated via SEM and TEM. The state, size and distribution of the remains of Re have been analyzed. It is demonstrated that the remains can reduce the size of NbCN to make the crystal microstructure of the steel finer.