不同混合气氛下9Ni钢的高温氧化行为研究  

Study on high temperature oxidation behavior of 9Ni steel in different mixed atmosphere

作　　者：李成刚[1] 贾泽伟 单文超 潘帅 曹光明[1] LI Chenggang;JIA Zewei;SHAN Wenchao;PAN Shuai;CAO Guangming(State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学,轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《轧钢》2021年第5期23-31,共9页Steel Rolling

基　　金：国家重点研发计划项目(2017YFB0304104);国家自然科学基金项目(U1660117);中央高校基本科研业务费项目(N180704008)。

摘　　要：对9Ni钢在不同氧分压及不同湿度条件下的高温氧化行为进行了研究。结果表明,9Ni钢的氧化行为会随着氧分压降低而受到阻碍,在低氧分压条件下没有Ni富集层产生,氧化进程受供氧量严重制约。而在不同湿度条件下,随着相对湿度的增大,氧化增重、氧化速率常数均增大;总氧化层厚度、Ni富集层厚度均增大,且增厚趋势趋于一致。潮湿环境下铁氧化层形成的大量裂纹、孔洞等缺陷,有利于气相物质的扩散,起到加速氧化的作用。In this paper,the oxidation behaviors of 9 Ni steel at high temperature under different oxygen pressure and humidity conditions were studied.The experimental results show that the oxidation behavior of 9 Ni steel will be hindered with the decrease of oxygen pressure,and there will be no nickel enrichment layer under the condition of low oxygen pressure,and the oxidation process is seriously restricted by oxygen supply.Under different humidity conditions,oxidation weight gain and oxidation rate constant increase with the increase of relative humidity.The total oxide layer thickness and the nickel enrichment layer thickness will increase,and the thickening trend tends to be the same.A large number of cracks and holes formed in the iron oxide layer in humid environment can facilitate the diffusion of gaseacs matter and accelerate the oxidation.

关 键 词：9NI钢 氧分压 氧化形貌 镍富集层 

分 类 号：TG142.1[一般工业技术—材料科学与工程]