加氧处理对700℃级超超临界锅炉合金GH2984饱和蒸汽氧化行为的影响（英文）  

Oxygenated Treatment on Saturated Vapour Oxidation Behaviors of GH2984 Alloys for 700 °C Ultra-supercritical Boilers

作　　者：王毓[1] 刘江南[1] 王正品[1] 要玉宏[1] 于在松[2] 鲁金涛[2] Wang Yu;Liu Jiangnan;Wang Zhengpin;Yao Yuhong;Yu Zaisong;Lu Jintao(Xi'an Technological University,Xi'an 710021,China;Xi'an Thermal Power Research Institute Co.Ltd,Xi'an 710032,China)

机构地区：[1]西安工业大学,陕西西安710021 [2]西安热工研究院有限公司,陕西西安710032

出　　处：《稀有金属材料与工程》2018年第12期3672-3677,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51371132)

摘　　要：采用氧化增重法、X射线衍射、扫描电子显微镜研究了不同溶解氧浓度下700℃级超超临界锅炉用GH2984镍基合金的750℃饱和蒸汽氧化行为,结果表明:GH2984合金在不同溶解氧浓度(10μg/L、5mg/L)的水蒸汽中生成的氧化层均为单层结构,主要由连续Cr_2O_3组成。加氧处理会造成GH2984合金氧化膜厚度增加和内氧化现象明显,并使得表面零散分布的Fe_2O_3瘤状凸起消失,转而生成更多富Cr瘤状凸起。另外,水中溶解氧浓度上升未引起GH2984合金表面Cr_2O_3氧化膜的加速挥发,但促进了Cr_2O_3氧化膜中少量Al_2O_3和TiO_2内氧化物的形成。The saturated vapor oxidation behavior of GH2984 alloys at 750℃ were investigated by oxidation weight increasing method,X-ray diffraction and scanning electronic microscopy in different dissolved oxygen concentrations.The results show that the oxide film of GH2984 alloys in different dissolved oxygen concentrations is of a single layer consisting of continuous Cr2O3.The oxidation mass gain of GH2984 alloys slightly increases with the increase of the dissolved oxygen concentrations in water vapor. Oxygenated treatment could accelerate the internal oxidation phenomenon,enhance the oxidation film thickness and make the scattered nodular bulges of Fe2O3 disappear and more Cr-rich nodular bulges form.Moreover,high dissolved oxygen concentrations do not affect the stabilization of Cr2O3 but contribute to the formation of a little Al2O3 and TiO2 which are oxidized internally.

关 键 词：GH2984镍基合金 蒸汽氧化 加氧处理 氧化膜 

分 类 号：TG146.15[一般工业技术—材料科学与工程]