摘要
通过扫描电镜对T91钢高温空气氧化层的形貌进行观察,利用x_Ray物相分析仪测试了氧化层的物相结构,利用热天平连续称重法对T91钢高温空气氧化速率进行测定,并分析了氧化层的脱落机理。结果表明:T91钢高温空气氧化的动力学曲线符合对数规律,氧化速率低于1级完全抗氧化性的标准;氧化层脱落的机理是界面裂纹和氧化层弓出弯曲破裂和剥落,也可以是氧化层内纵向裂纹的不穿透破裂剥落。
The morphologies of oxide layers of T91 steel under the high temperature air was observed using SEM; the phase structure of the oxide layers was analyzed by X-ray diffraction; moreover the oxidation rate of T91 steel under the high temperature air was studied using Thermo-balance. The peeling mechanism of the oxide layer was analyzed. The results showed that the oxidation kinetic curve for T91 steel under the high temperature air is a logarithmic parabola, its oxidation rate is lower than the value of the primary anti-oxidation. The boundary cracks and oxide layer bending and rupturing, or longitudinal cracks which do not run through the oxide layer lead to the oxide layer rupture and peel off.
出处
《铸造技术》
EI
CAS
北大核心
2005年第7期578-580,共3页
Foundry Technology
关键词
空气氧化
T91钢
氧化层
剥落
氧化动力学
Air oxidation
T91 steel
Oxide layer
Oxide layer peeling
Oxidation kinetics
