Development of 1100 A°C Capable Alumina-Forming Austenitic Alloys

被引：27
作者：
Brady, M. P. [1 ]
Muralidharan, G. [1 ]
Yamamoto, Y. [1 ]
Pint, B. A. [1 ]
机构：
[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
来源：
OXIDATION OF METALS | 2017年 / 87卷 / 1-2期
关键词：
Alumina; Water vapor; Fe-base alloy; Ni-base alloy; HIGH-TEMPERATURE OXIDATION; STAINLESS-STEELS; CREEP-RESISTANT; WATER-VAPOR; CORROSION; BEHAVIOR; SCALES; MICROSTRUCTURE; OPTIMIZATION; ADDITIONS;
D O I：
10.1007/s11085-016-9667-3
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Recently developed alumina-forming austenitic (AFA) alloys based on similar to 12-32 weight % (wt%) Ni offer an attractive combination of oxidation resistance and creep resistance at relatively low alloy cost. However, they exhibit a transition to internal oxidation and nitridation of Al above similar to 750-950 A degrees C depending on composition and exposure environment. In order to identify AFA compositions capable of higher-temperature operation for applications such as ethylene cracking, the oxidation behavior of a series of developmental, as-cast nominal Fe-(25-45)Ni-(10-25)Cr-(4-5)Al-1Si-0.15Hf-0.07Y-0.01B wt% base alloys with and without Nb, Ti, and C additions was evaluated at 1100 A degrees C in air with 10% water vapor. Protective alumina scale formation was observed at levels of 35Ni, 25Cr, and 4Al with additions of Nb and C, indicating promise for 1100A degrees C capable cast AFA alloys.
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页码：1 / 10
页数：10
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