摘要
通过TGA(热重分析)测定了在模拟热轧过程的1000℃～1200℃空气中304奥氏体不锈钢短期氧化过程的质量变化,并采用SEM、EDS、GDE-OES、XPS和XRD等手段观察和分析了氧化膜的形貌、组成与结构.结果表明:在1000℃和1100℃氧化60 min的时间内,304不锈钢的氧化过程基本遵从抛物线规律;在1200℃氧化16 min后,则出现了快速失稳氧化.在所有三个实验温度下氧化258 s,钢表面均能形成完整的氧化膜.在1000℃,氧化膜由(Cr_(1.3)Fe_(0.7))O_3组成,而在1100℃和1200℃的氧化膜,则有少量Mn_(1.5)Cr_(1.5)O_4生成.此外,随着氧化温度的提高,氧化膜表面的O含量明显升高,Fe和Ni含量下降,这与氧化膜的厚度有关.
The short-term oxidation behavior of 304 stainless steel at temperatures from 1000℃to 1200℃in air under the condition of simulated hot-rolling was studied by thermo-gravimetric analysis（TGA） method.Meanwhile,the morphology,composition and phase constituent of oxide scales formed were characterized by SEM,EDS,GDE-OES,XPS and XRD.The results show that the oxidation process of 304ss followed parabolic law at 1000℃and 1100℃within an exposing period of 60 min;while rapid breakaway oxidation took place at 1200℃after 16 min.All the oxidation at the three temperatures for 258 s resulted in formation of a complete oxide scale on the surface of 304ss.The oxide scale consisted mainly of（Cr1.3Fe0.7）O3 at 1000℃,and besides which, （Cr1.3Fe0.7）O3,Mn1.5Cr1.5O4 did appeare at 1100℃and 1200℃.Furthermore,oxygen content in the outer-layer of the scales increased and iron and nickel content decreased with temperature increasing,which should be related to the thickening of the oxide scales.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2011年第1期5-8,共4页
Corrosion Science and Protection Technology
