脱碳时间对Fe-3%Si钢氧化层组成及形貌的影响

发布时间：2018-03-27 11:46

本文选题：脱碳退火　切入点：内氧化　出处：《钢铁研究学报》2017年12期

【摘要】：脱碳退火时间是决定Fe-3%Si钢表面内氧化行为的重要工艺参数之一,继而影响着后续渗氮及二次再结晶工艺。在1 103K的退火温度及N2+H2+H2O的退火气氛下进行了脱碳退火实验,研究了退火时间对Fe-3%Si钢表面氧化行为的影响。通过傅里叶变换红外光谱仪、扫描电镜及辉光放电质谱仪观察了Fe-3%Si钢表面氧化层的演变过程,分析了氧化层内硅、氧含量分布趋势,建立了氧化层结构与氧化物含量之间的关系。实验结果表明,经过脱碳退火后,Fe-3%Si钢表面氧化物由二氧化硅和铁橄榄石组成。随着退火时间的延长,内氧化层增厚,硅元素在内氧化层中的富集程度增加。当硅钢表面氧化深度相同时,氧化物含量随退火时间的增加而增多。
[Abstract]:The decarburization annealing time is one of the important process parameters to determine the oxidation behavior on the surface of Fe-3%Si steel, and then affects the subsequent nitriding and secondary recrystallization process. The decarburization annealing experiments were carried out at the annealing temperature of 1103K and the annealing atmosphere of N 2H 2O. The effect of annealing time on the surface oxidation behavior of Fe-3%Si steel was studied. The evolution process of oxide layer on Fe-3%Si steel surface was observed by Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and glow discharge mass spectrometer (GDS). The relationship between the oxide structure and the oxide content has been established. The experimental results show that the oxide on the surface of Fe-3Si steel after decarbonization annealing is composed of silicon dioxide and iron olivine. The thickness of internal oxidation layer is thicker and the enrichment degree of silicon element in internal oxidation layer is increased. When the surface oxidation depth of silicon steel is the same, the oxide content increases with the increase of annealing time.
【作者单位】：武汉科技大学耐火材料与冶金国家重点实验室;国家硅钢工程技术研究中心;
【分类号】：TG142.1;TG161

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