含砷/铜砷C-Mn钢的高温氧化行为  

High temperature oxidation behavior of C-Mn steels containing As/Cu-As

作　　者：辛文彬[1,2] 宋波[1,2] 胡春林[1,2] 宋明明[1,2] 孙桂林[1,2] 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《工程科学学报》2015年第3期317-323,共7页Chinese Journal of Engineering

基　　金：国家自然科学基金资助项目(51174019);中央高校基本科研业务费专项资金资助项目(FRF-SD-12-010A)

摘　　要：利用热重分析仪、扫描电镜和电子探针研究了含As或者Cu+As的C-Mn钢的高温氧化特性.1050℃氧化初期约500 s内,As钢和Cu-As钢为线性氧化阶段,随后转为抛物线氧化,两种钢的抛物线氧化速率均高于C-Mn钢.因氧化层分离,1150℃氧化增重小于1050℃氧化增重.钢中Cu和As的存在促进了固相Fe2Si O4层的生长.由于As在氧化层/基体界面的富集,1050℃氧化时,As钢中存在明显的条带状内部氧化粒子层;C-Mn钢中加入Cu和As后,其氧化层/基体界面变得崎岖不平,内部氧化粒子的数量随着氧化时间及氧化温度的增加而增加.1050℃氧化时氧化层/基体界面处Cu和As的富集程度高于1150℃氧化.The high temperature oxidation characteristics of C- Mn steels containing As or Cu ＋ As were investigated by thermo- gravimetry, scanning electron microscopy, and electron probe micro-analysis. It is shown that the oxidation kinetic curves at 1050 ℃ obey a linear law in the first 500 s and subsequently change to a parabolic law. The parabolic oxidation rates of the As and Cu- As steels are higher than that of the C-Mn steel. Due to separation of the scale from the matrix, the mass increment of the steels at 1150℃ is smaller than that at 1050℃. Cu and As in the steels could promote solid Fe2SiO4 layer growth. A significant internal oxidation particle layer is observed in the As steel because of As enrichment at the scale/steel interface at 1050 ℃. The interface is found to be uneven when Cu and As are added to the C-Mn steel, and the number of internal oxides increases with increasing oxidation time and temperature. The oxidation enrichment degree of Cu and As at the scale/steel interface at 1050 ℃ is higher than that at 1150℃.

关 键 词：钢 铜 砷 氧化动力学 内部氧化 富集 

分 类 号：TG142.14[一般工业技术—材料科学与工程]