K465合金的红外特性研究  

Study on Infrared Characteristics of K465 Alloy

作　　者：王瑜 段士昌 毛高翔 候韶凯 WANG Yu;DUAN Shichang;MAO Gaoxiang;HOU Shaokai(AVIC Guizhou Liyang Aviation Power Co.,Ltd.,Guiyang 550014,China;Shaanxi Huaqin Technology Industry Co.,Ltd.,Xi'an 710048,China)

机构地区：[1]中国航发贵州黎阳航空动力有限公司,贵州贵阳550014 [2]陕西华秦科技实业有限公司,陕西西安710048

出　　处：《热加工工艺》2021年第12期50-54,共5页Hot Working Technology

摘　　要：研究了K465镍基高温合金在不同温度氧化不同时间后的质量变化趋势。采用SEM、EDS分别表征了K465合金在800℃氧化不同时间后合金的表面微观形貌和成分,分析了该合金的高温氧化行为。采用IR-2双波段发射率测试仪和红外热像仪分别测试K465合金在不同状态下的红外发射率和3~5μm的热辐射强度。结果表明,K465合金在高温下先快速氧化增重,主要为表面层成分发生了氧化,且氧化初期氧化物的成分主要为Ni和Al的氧化物。由于Cr元素向合金表面扩散速率较大,最终氧化物的成分主要为Ni和Cr的氧化物,其氧化行为符合抛物线规律。随合金表面粗糙度的增加、氧化温度的提高及氧化时间的延长,合金红外发射率显著上升,且红外发射率的变化趋势与合金的红外热辐射强度变化趋势几乎一致。The mass change trend of K465 nickel base superalloy at different temperature and oxidation time was studied.The surface morphology and composition of K465 alloy after oxidation at 800 ℃ for different time were characterized by SEM and EDS, respectively. The high temperature oxidation behavior of K465 alloy was analyzed. The infrared emissivity and 3-5 μm thermal radiation intensity of K465 alloy in different states were measured by IR-2 dual band emissivity tester and infrared thermal imager. The results show that the mass gain of K465 superalloy increases rapidly at high temperature, mainly due to the oxidation of the surface layer components. At the initial stage of oxidation, the oxides mainly consist of Ni and Al oxides, and due to the large diffusion rate of Cr to the alloy surface, the final oxides mainly consist of Ni and Cr oxides, and their oxidation behavior conforms to the parabolic law. The infrared emissivity of K465 alloy increases significantly with the increase of surface roughness, oxidation temperature and oxidation time, and the trend of infrared emissivity and infrared thermal radiation intensity of the alloy is almost the same.

关 键 词：K465合金 氧化动力学 微观特性 高温氧化 红外发射率 

分 类 号：TG132.32[一般工业技术—材料科学与工程]