Tianyi Zhang, Chenjun Yu, Bo Xiao, Ju Liu, Zhongliang Zhu, Naiqiang Zhang
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引用次数: 0
摘要
研究了 316L 奥氏体钢在超临界水（600 ℃/25 MPa）中 600 ℃ 6 h 热时效 1000 h 后的氧化行为。结果表明，热时效后钢的晶粒尺寸和高角晶界（HAGB）比例增加，并观察到微观纹理。时效处理后钢的增重率增加，表明氧化层中的 Cr2O3 含量减少，导致氧化层中 Fe 和 O 离子的扩散率增加。分子动力学模拟结果证实了 HAGB 中的高氧化率和 316L 钢在时效处理后的微观纹理。
Effects of Thermal Aging on the Oxidation Behavior of 316L Austenitic Steel in 600 °C Supercritical Fired Boiler: Mechanism Based on Interface Features
The oxidation behavior of 316L austenitic steel after thermal aging process at 600 °C for 6 h was investigated in the supercritical water (600 °C/25 MPa) with 1000 h. Results showed that the grain size and the proportion of high angle grain boundaries (HAGB) increased in the steel after thermal aging process, with the observation of micro-textures. The weight gain rate of the steel after aging process increased, presenting the decreased Cr2O3 contain in the oxide layer, which resulted in the increasing diffusion rate of Fe and O ions in oxide layer. The molecular dynamics simulation results confirmed the high oxidation rate in HAGB and micro-textures for the 316L steel after aging process.
期刊介绍：
This international journal presents compact reports of significant, original and timely research reflecting progress in metallurgy, materials science and engineering, including materials physics, physical metallurgy, and process metallurgy.
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