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

Xie Xiao; Wang Xiaojun; Xia Tiandong

doi:10.15980/j.tzzz.2022.04.018

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Effects of Rare Earth Y on Oxidation Resistance of Cr20Ni80 Electrothermal Alloy at High Temperature
Vol. 42, Issue 4, Pages: 482-485(2022)
Published： 2022 ，
DOI： 10.15980/j.tzzz.2022.04.018

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Xie Xiao, Wang Xiaojun, Xia Tiandong. Effects of Rare Earth Y on Oxidation Resistance of Cr20Ni80 Electrothermal Alloy at High Temperature. [J]. Special Casting & Nonferrous Alloys 42(4):482-485(2022)
DOI：

Xie Xiao, Wang Xiaojun, Xia Tiandong. Effects of Rare Earth Y on Oxidation Resistance of Cr20Ni80 Electrothermal Alloy at High Temperature. [J]. Special Casting & Nonferrous Alloys 42(4):482-485(2022) DOI： 10.15980/j.tzzz.2022.04.018.

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1 000℃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

此外还有一定量的NiCr

其中添加0.3%的Y后Cr20Ni80合金的高温抗氧化性最好。

Abstract

Four kinds of Cr20 Ni80 alloys 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 1 000 ℃ 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

with a certain amount of NiCr

among which the alloy with 0.3%Y has the desirable high-temperature oxidation resistance.