Fe-Cr-Ni-Ti高温合金氧化动力学研究

中国腐蚀与防护学报

1986, Vol. 6

Issue (2): 145-152

研究报告

本期目录 | 过刊浏览

Fe-Cr-Ni-Ti高温合金氧化动力学研究

王嘉敏;董佩环;刘冶

洛阳船舶材料研究所;洛阳船舶材料研究所;东北工学院

AN INVESTIGATION OF THE OXIDATION DYNAMICS OF AN Fe-Cr-Ni-Ti SUPERALLOY

Wang Jiamin Dong Peiuhan and Liu Ye(Luoyang Shipbuilding Material Research Institute) NortheastInstitute of Technology Shenyang

全文: PDF(1255 KB)

摘要: 研究了一种Fe-Cr-Ni-Ti铸造高温合金在700～300℃范围内10分钟～500小时的氧化动力学。氧化增重符合抛物线规律;氧化凹坑深度的发展符合直线规律。氧化激活能Q_(P1)=38kcal/mol,Q_(P2)=42kcal/mol。短时氧化膜富Fe、Ti、Cr,主要由Fe_2O_2、TiO_2和Cr_2O_2组成;长时间氧化层主要由NiTi O_3和Fe Cr_2 O_4组成。氧化过程中,阳离子空位相互结合形成空穴,穴长大连接成空穴带,它是氧化层剥落的裂纹源。不均匀氧化剥落凹坑是η-Ni_3Ti或γ′-Ni_2(Al、Ti)选择性氧化所致。较高的含Ti量阻碍Cr_2O_3的形成,促进了尖晶石类型氧化物的形成,使合金抗氧化性能下降。

Abstract：The oxidation kinetics of an Fe-Cr-Ni-Ti superalloy, containing 4.43at％ titanium was studied in air over the temperature range of 700～900℃ for period of 10 minutes to 500 hours. The weightgain due to oxidation obeyed the conventional parabolic lair and the values of activation energy were Qp_1=38 kcal/mol and Qp_2=42 kcaI/mol. The depth of penetrating pits obeyed linear iaw. AES/ESCA indicated the initial sclae was rich in Ti, Fe and Cr, Consiting mainly of Fe_2O_3, TiO, and Cr_2O_3. By X-ray analysis the long-term oxides were estimated to be NiTiO_3 and FeCr_2O_4. The cation vacanies generated in oxidition at the alloy-scale inteerface joined up to produce oracks and caused spalling. The selective oxidation of η-Ni_3Ti phases genrated random penetsrating pits. The higher titanium concentration obstructed the formation of Cr_2O_3 protective scale and promoted the formation of NiTiO_3, thus deteriorated the oxidation resistance

收稿日期: 1986-04-25

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引用本文:

王嘉敏;董佩环;刘冶. Fe-Cr-Ni-Ti高温合金氧化动力学研究[J]. 中国腐蚀与防护学报, 1986, 6(2): 145-152.
. AN INVESTIGATION OF THE OXIDATION DYNAMICS OF AN Fe-Cr-Ni-Ti SUPERALLOY. J Chin Soc Corr Pro, 1986, 6(2): 145-152.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1986/V6/I2/145

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