Effect of Pre-oxidation Temperature on High-Temperature Cyclic Oxidation Resistance of Ni-15Cr-5Al-5Si Alloy
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摘要: 采用粉末冶金方法制备Ni-15Cr-5Al-5Si （质量分数/%）合金，经不同温度（500，700，900，1 100℃）预氧化处理后，在1 100℃进行了循环氧化试验，研究了预氧化温度对该合金抗高温（1 100℃）循环氧化性能的影响，并与未添加硅的Ni-15Cr-5Al合金进行了对比。结果表明：Ni-15Cr-5Al-5Si合金的抗高温循环氧化性能显著优于Ni-15Cr-5Al合金的；预氧化处理可以提高合金的抗高温循环氧化性能，随预氧化温度的升高，抗高温循环氧化性能提高，但提高效果不明显。
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关键词:
- 预氧化 /
- 高温循环氧化 /
- Ni-15Cr-5Al合金
Abstract: Ni-15Cr-5Al-5Si (mass fraction/%) alloy was prepared by powder metallurgy method. After pre-oxidation at different temperatures (500,700,900,1 100℃), cyclic oxidation tests were carried out on the alloy at 1 100℃. The effect of pre-oxidation temperature on the high temperature (1 100℃) cyclic oxidation resistance of the alloy was studied and compared with that of Ni-15Cr-5Al alloy without silicon addition. The results show that the high-temperature cyclic oxidation resistance of the Ni-15Cr-5Al-5Si alloy was higher than that of the Ni-15Cr-5Al alloy. Pre-oxidation improved the high-temperature oxidation resistance of the alloy. With increasing pre-oxidation temperature, the high-temperature cyclic oxidation resistance increased, but the increase effect was not obvious.-
Keywords:
- pre-oxidation /
- high temperature cyclic oxidation /
- Ni-15Cr-5Al alloy
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