表面改性对Super304H钢在650℃饱和蒸汽中氧化行为的影响  

Influence of surface modification on steam oxidation of Super304H at 650 ℃

作　　者：乐明[1,2] 王弘喆[1] 于在松[1] 鲁金涛[1] 杨珍[1] 上官晓峰[2] 谷月峰[1] 

机构地区：[1]西安热工研究院有限公司,陕西西安710032 [2]西安工业大学,陕西西安710032

出　　处：《热力发电》2016年第11期42-47,60,共7页Thermal Power Generation

基　　金：国家自然科学基金项目(51301130;51401163);西安热工研究院有限公司研发基金(ZD-15-TYK08)

摘　　要：对未改性的Super304H钢和经喷丸、渗铝改性后的Super304H钢在650℃饱和蒸汽中的氧化行为进行研究,使用电子天平测量氧化增重,利用X射线衍射仪、扫描电子显微镜对氧化膜进行了分析。结果表明:未进行表面改性的Super304H钢抗蒸汽氧化能力不足,喷丸对Super304H钢抗蒸汽氧化能力有一定提升作用,渗铝处理可显著提升Super304H钢抗蒸汽氧化能力;Super304H钢外层氧化膜为Fe2O3,内层氧化膜为Fe-Cr尖晶石,外层氧化膜生长至一定厚度易发生剥落;喷丸样品氧化膜由Cr2O3与少量的Mn-Fe尖晶石组成,但变形孪晶层因相邻亚晶界凸出、吞并而退化;渗铝样品表面形成Al2O3氧化膜,互扩散区Al元素含量保持不变。The saturated steam oxidation behavior of Super304H at 650 ℃ was studied,of which the Super304H is shot peened and aluminized before the oxidation experiment. The high accuracy electronic balance was applied to measure the mass gain of samples, and the XRD and SEM were employed to analyze the oxide films. The results show that, the antioxidant capacity of the Super304H without surface modification was poor, shot peening could improve the antioxidant capacity of the Super304H,and the antioxidant capacity of the Super304H was significantly improved after being aluminized. The outer oxide film of the Super304H was formed by Fe2O3 ,the inner oxide film was Fe-Cr spinel,and the oxide film of the shot peened sample formed by Cr2O3 and a small amount of Mn-Fe spinel composition. However,the deformation twin layer degraded because of the growth and annexation of the adjacent sub-grain boundaries. The Al2O3 film formed on the surface of the aluminized sample,while Al content in diffusion zone remained unchanged.

关 键 词：SUPER304H钢 喷丸 渗铝 抗蒸汽氧化 氧化膜 表面改性 XRD SEM 

分 类 号：TG174.4[金属学及工艺—金属表面处理]