摘要
在750℃水蒸气中开展GH750和Haynes 282的氧化行为研究。利用增重法获得2种合金的氧化动力学规律,利用扫描电子显微镜和能谱仪分析氧化物的形貌和元素分布,利用X射线衍射仪对合金表面氧化物进行物相分析。结果表明:2种合金的氧化动力学行为基本符合抛物线规律,其中GH750的抗水蒸气氧化性能优于Haynes 282;GH750和Haynes 282表面氧化层主要由Cr2O3和少量(Ni, Co)Cr_(2)O_(4)、TiO_(2)组成,氧化层/基体界面存在主要由Al_(2)O_(3)和TiO_(2)组成的内氧化区,靠近界面附近的基体内部出现了明显的贫铬区。
Oxidation behaviors of GH750 and Haynes 282 in steam at 750 ℃ were investigated. Oxidation kinetics of two alloys was obtained by weight gain method, the morphology and element distribution of the oxides were analyzed by scanning electron microscope and energy dispersive spectroscopy, and the phase of oxides on alloy surface was analyzed by X-ray diffraction. Results show that oxidation kinetics of the two alloys obeys the parabolic law approximately, moreover, the steam oxidation resistance of GH750 is superior to that of Haynes 282. Oxides formed on the surfacee of GH750 and Haynes 282 are mainly composed of Cr_(2)O_(3) and a small amount of(Ni, Co)Cr_(2)O_(4) and TiO_(2). An internal oxidation zone mainly composed of Al_(2)O_(3) and TiO_(2) exists at oxide/substrate interface, and an obvious chromium depletion region appears in the substrate near the interface.
作者
倪一帆
杨昌顺
王苗苗
NI Yifan;YANG Changshun;WANG Miaomiao(Shanghai Power Equipment Research Institute Co.,Ltd.,Shanghai 200240,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2021年第7期596-601,共6页
Journal of Chinese Society of Power Engineering
作者简介
倪一帆(1991-),男,上海人,工程师,硕士,主要从事电站高温合金材料的腐蚀行为研究。电话(Tel.):021-34796346,E-mail:niyifan@speri.com.cn。
