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以铌钛双稳定430铁素体不锈钢(NTS430FSS)与SUS430铁素体不锈钢(SUS430FSS)为实验材料,研究了稳定化元素铌钛对其高温抗氧化性的影响。通过恒温氧化实验得到两种材料的氧化动力学行为曲线,结合扫描电镜、能谱分析以及X射线衍射等分析方法探究高温氧化的微观机理。结果表明,稳定化元素钛可以显著降低单位面积氧化增重,使得氧化激活能由72.6 kJ/mol提高至121.6 kJ/mol。钛的氧化物镶嵌在氧化膜与基体之间,提高了氧化膜与基体的附着力,改善了材料的高温抗氧化性能。
The effect of niobium-stabilized titanium niobate on the high-temperature oxidation resistance of niobium-titanium bismuth ferritic stainless steel (NTS430FSS) and SUS430 ferritic stainless steel (SUS430FSS) was studied. The oxidation kinetics curves of the two materials were obtained by the experiments of isothermal oxidation. The microscopic mechanism of high temperature oxidation was explored by means of SEM, EDS and XRD. The results show that the stabilization of titanium can significantly reduce the oxidation weight gain per unit area, making the oxidation activation energy increased from 72.6 kJ / mol to 121.6 kJ / mol. Titanium oxide inlaid between the oxide film and the matrix to improve the adhesion of the oxide film and the matrix to improve the high temperature oxidation resistance of the material.