摘要
研究了含４％Ｔｉ、９％Ｍｎ和８％Ｎｂ的Ｆｅ２５Ｃｒ合金在８００℃、１０－３～１Ｐａ硫分压范围内Ｈ２Ｈ２Ｓ混合气氛中的高温硫化，硫化动力学均基本遵循抛物线规律。当硫化层开裂或者与基体分离时，硫化增重—时间曲线出现转折。对比Ｆｅ２５Ｃｒ合金，３种元素的加入均不同程度地降低了硫化速度，但未根本改变硫化层结构。讨论了Ｆｅ２５Ｃｒ基三元合金的硫化过程及３种合金元素的作用。
The investigation on the hightemperature sulfidation properties of Fe_25Cr alloys containing 4%Ti, 9%Mn or 8%Nb in H_2H_2S mixed environments of 10^-3～1 Pa sulfur partial pressures at 800 ℃ was carried out. The sulfidation kinetics follows the parabolic law essentially. Turning aside from the parabolic law takes place when the sulfide scales crackes or seperates from the substrate at high temperature. Compared with the Fe25Cr alloy, the addition of these three elements reduce the sulfidation rate to varying degrees, but can not improve the sulfide scale structure. The sulfidation processes of Fe_25Cr alloys and the effect of alloying elements have been discussed.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
1998年第1期33-37,共5页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金
