稀土Y对Cr20Ni80电热合金高温抗氧化性的影响  

Effects of Rare Earth Y on Oxidation Resistance of Cr20Ni80 Electrothermal Alloy at High Temperature

作　　者：谢霄 王晓军[1,2] 夏天东[1,2] Xie Xiao;Wang Xiaojun;Xia Tiandong(College of Materials Science and Engineering,Lanzhou University of Science and Technology;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Science and Technology)

机构地区：[1]兰州理工大学材料科学与工程学院,兰州730050 [2]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州730050

出　　处：《特种铸造及有色合金》2022年第4期482-485,共4页Special Casting & Nonferrous Alloys

基　　金：甘肃省省部级重大专项基金资助项目(145RTSA004)

摘　　要：采用非自耗真空电弧熔炼炉制备了4种不同稀土Y含量的Cr20Ni80合金,探讨稀土对合金高温抗氧化性的影响。通过XRD、SEM、EPMA等分析手段研究了稀土含量对Cr20Ni80电热合金在1000℃下的高温氧化行为。结果表明,Y显著改善了Cr20Ni80合金的高温抗氧化性,氧化膜的致密度与基体合金的粘附性得到增强,氧化膜主要成分为Cr_(2)O_(3),此外还有一定量的NiCr_(2)O_(4),其中添加0.3%的Y后Cr20Ni80合金的高温抗氧化性最好。Four kinds of Cr20Ni80alloys with different rare earth Y contents were prepared by non-consumable vacuum arc melting furnace,and the effect of rare earth on high temperature oxidation resistance of alloy was explored.The oxidation behavior of alloys at 1000℃were investigated by XRD,SEM and EPMA.The results indicate that Y addition can significantly improve the high-temperature oxidation resistance of the alloy,and the density of the oxide film and the adhesion of the matrix alloy are enhanced.The main component of the oxide film is Cr_(2)O_(3)with a certain amount of NiCr_(2)O_(4),among which the alloy with 0.3%Y has the desirable high-temperature oxidation resistance.

关 键 词：稀土元素 氧化膜 高温氧化 电热合金 

分 类 号：TG132.3[一般工业技术—材料科学与工程]