镍基高温合金Inconel 600高温氧化行为  

High Temperature Oxidation Behavior of Nickel-Based Superalloy Inconel 600

作　　者：赵鑫圻 肖旋[1] 刘梓童 ZHAO Xin-qi;XIAO Xuan;LIU Zi-tong(School of Materials Science and Engineering,Shenyang Ligong University,Shenyang 110159,Liaoning,China)

机构地区：[1]沈阳理工大学材料科学与工程学院,辽宁沈阳110159

出　　处：《铸造》2022年第7期827-832,共6页Foundry

摘　　要：研究镍基高温合金Inconel 600在900~1000℃条件下的高温氧化行为。借助扫描电子显微镜、能谱、X射线衍射仪、背散射电子衍射等检测仪器,对样品表面氧化膜的相组成、形貌和结构特点,以及氧化膜横截面的元素分布特征进行表征和分析,并绘制该合金的氧化动力学曲线。结果表明:Inconel 600镍基高温合金在900~1000℃范围内的氧化动力学符合二次抛物线规律,Inconel 600镍基高温合金在900℃及以下温度区间范围内属于完全抗氧化级,在900~1000℃温度区间内属于抗氧化级。Inconel 600镍基高温合金的氧化膜由内氧化层和外氧化层两部分组成:内氧化层主要由Al_(2)O_(3)组成,受O原子在晶界的扩散和Al原子的晶内扩散影响,Al_(2)O_(3)主要分布在外氧化层附近基体的晶界上;外氧化层主要由连续的Cr_(2)O_(3)氧化膜,以及掺杂在其中的NiCr_(2)O_(4)、MnO_(2)、TiO_(2)、MnO和TiO构成。The high temperature oxidation behavior at 900-1000℃of nickel-based superalloy Inconel 600 was investigated.The phase composition,morphology and structure characteristics of the film on the surface of the sample,as well as the element distribution of the film were analyzed by means of scanning electron microscopy(SEM),energy spectrum(EDS),X-ray diffraction(XRD)and backscattered electron diffraction(EBSD).Then the oxidation kinetics curves of the alloy were plotted.The experimental results showed that the oxidation kinetics of the Inconel 600 alloy in the temperature range of 900-1000℃basically conformed to the quadratic parabola law.The Inconel 600 alloy belonged to the complete oxidation resistance grade lower than 900℃,and belonged to the oxidation resistance grade in the temperature range of 950 to 1000℃.The oxidation film of the Inconel 600 alloy consisted of inner and outer oxide layer.The inner oxide layer was mainly composed of Al_(2)O_(3).Under the influence of the diffusion behavior of O atom in grain boundary and diffusion behavior of Al atom in grain boundary,the Al_(2)O_(3) was mainly distributed on the grain boundary of matrix near the outer oxide layer.The outer oxide layer was mainly composed of continuous Cr_(2)O_(3) oxide film.And NiCr_(2)O_(4),MnO_(2),TiO_(2),MnO as well as TiO doped in it.

关 键 词：Inconel 600合金 高温氧化 氧化动力学曲线 氧化产物 

分 类 号：TG141[一般工业技术—材料科学与工程]