Influence of Pre-oxidation on the Hot Corrosion of DZ68 Superalloy in the Mixture of Na2SO4-NaCl

被引：22

作者：

Liu, Enze ^{[1
]}

Zheng, Zhi ^{[1
]}

Guan, Xiurong ^{[1
]}

Tong, Jian ^{[1
]}

Ning, Likui ^{[1
]}

Yu, Yongsi ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2010年 / 26卷 / 10期

关键词：

DZ68; superalloy; Pre-oxidation; Hot corrosion; BEHAVIOR;

D O I：

10.1016/S1005-0302(10)60143-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

DZ68 alloy is a new Ni-base directionally solidified superalloy for the blade of advanced turbine engine with high ratio of thrust-mass In order to investigate the influence of pre-oxidation on the hot corrosion resistance of DZ68 alloy pre-oxidation treatment was conducted at 950 degrees C in air for 20 h A mixture of 75% Na2SO4+25% NaCl (in mass fraction) was used for hot corrosion study at 900 degrees C The microstructure of specimens was investigated by using a scanning electron microscope (SEM) equipped with an energy dispersive spectroscopy (EDS) The compositions of the corroded specimens were determined by X-ray diffraction (XRD) After pre-oxidation at 950 degrees C in air for 20 h a protective scale consisting of Cr2O3 Al2O3 NiO NiCr2O4 and Ni2Ti4O formed on the DZ68 superalloy surface The pre-oxidation treatment improved the initial incubation stage of the alloy in the mixture of 75% Na2SO4+25% NaCl melts at 900 degrees C The oxide layer degraded gradually with increasing the time of hot corrosion Once the oxide layer was damaged the corrosion rate would increase rapidly accompanied by obvious spoliation of the corrosion products At 900 degrees C the pre-oxidation treatment could not inhibit the accelerated hot corrosion of DZ68 in the mixture of 75% Na2SO4+25% NaCl melts with a high corrosion rate

引用

页码：895 / 899

页数：5

共 20 条

[1] Hot-corrosion of silicon carbide in combustion gases at temperatures above the dew point of salts
Carruth, M
Baxter, D
Oliveira, F
Coley, K
[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 1998, 18 (16) : 2331 - 2338
[2] NIAL ALLOYS FOR HIGH-TEMPERATURE STRUCTURAL APPLICATIONS
DAROLIA, R
[J]. JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY, 1991, 43 (03): : 44 - 49
[3] Duhl D.N., 1988, P SUP 1988 WARR PA, P235, DOI DOI 10.7449/1988/SUPERALLOYS_1988_235_244.PDF
[4] Gell M., 1980, Superalloys 1980, P205
[5] GLATZEL U, 1989, METALL, V23, P1839
[6] Liu EZ, 2009, J MATER SCI TECHNOL, V25, P727
[7] Liu E, 2009, ACTA METALL SIN, V45, P1217
[8] Influence of pre-oxidation on the hot corrosion of M38G superalloy in the mixture of Na2SO4-NaCl melts
Liu, G. M.
Yu, F.
Tian, J. H.
Ma, J. H.
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 496 (1-2): : 40 - 44
[9] Ning LK, 2009, ACTA METALL SIN, V45, P161
[10] PETTINARISTURME.F, 2005, ENG A, V400, P114

← 1 2 →