Synergistic effect of residual elements on oxidation rates and oxide/metal interface characteristics in a low-carbon steel oxidized at 1180°C for 3 hours
Synergistic effect of residual elements on oxidation rates and oxide/metal interface characteristics in a low-carbon steel oxidized at 1180°C for 3 hours
复制标题
DOI：
10.1080/03019233.2023.2201545
复制
发表时间：
2023-05
影响因子：
2.1
通讯作者：
Jiaqi Duan;D. Farrugia;C. Davis;Zhiming Yan;Zushu Li
中科院分区：
文献类型：
--
作者：
Jiaqi Duan;D. Farrugia;C. Davis;Zhiming Yan;Zushu Li
在低碳钢中添加不同含量的残余元素（Cu、Ni和Sn），以模拟钢铁生产过程中废钢使用量增加的情况。使用热重分析（TGA），将样品在空气中氧化以代表热轧前的再加热。利用扫描电子显微镜（SEM）和能谱仪（EDS）研究了氧化物/金属界面的微观结构和富集情况。结果表明，残余元素对氧化皮/金属界面的粗糙度、内部铁氧化物的形成、界面处富Ni、Cu的Fe相和富Cu、Sn的液相的数量以及液相沿晶界沿着渗透的深度和间距均有影响。热力学模拟预测了残余元素对界面液相形成的影响，预测结果与实验结果吻合较好。讨论了残余元素对氧化速率的影响。
Residual elements (Cu, Ni and Sn) of various contents have been added to a low-carbon steel to simulate the scenario of increased use of scrap during steel production. The samples were oxidized in air to represent reheating before hot rolling, using thermogravimetry analysis (TGA). Scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS) were employed to investigate the microstructure and the enrichments at the oxide/metal interface. Results showed the residual elements had an impact on the roughness of the scale/metal interface, internal Fe oxides formation, the amount of Ni&Cu enriched Fe phase and Cu&Sn enriched liquid phase at the interface, and the depth and spacing of the liquid phase penetrations along the grain boundaries. Thermodynamic simulation predicted the effect of residual elements on liquid phases formation at the interface, with good agreement between prediction and experimental results. The influence of residual elements on the oxidation rate was discussed.