钴基高温合金的循环氧化行为研究

中国腐蚀与防护学报, 2002, 22(2): 115-123. doi: 10.3969/j.issn.1005-4537.2002.02.013

钴基高温合金的循环氧化行为研究

袁福河 ^1, , 孙晓峰 ^2, , 管恒荣 ^3, , 胡壮麒 ^4,

1.中国科学院金属研究所,沈阳,110016

2.中国科学院金属研究所,沈阳,110016

3.中国科学院金属研究所,沈阳,110016

4.中国科学院金属研究所,沈阳,110016

基金项目: 国家重点实验室基金

关键词：钴基高温合金 , 循环氧化

CYCLIC OXIDATION BEHAVIOR OF A COBALT-BASE SUPERALLOY

研究了钴基高温合金K40S在950℃和1000℃的循环氧化行为.发现合金在950℃ 400 h以内的抗循环氧化性能较好.合金在1000℃氧化50 h以后因为表面氧化膜剥落开始出现失重现象.在1000℃循环氧化初期的产物主要为Cr2O3,其次为CoCr2O4和少量的CoO,400 h以后,Cr2O3基本剥落,合金表面由于Cr的损耗又生成Cr2WO6、NiCr2O4以及挥发性的WO3氧化产物.添加Si和Mn元素使K40S合金抗循环氧化性能明显地比不含Si和Mn元素的DZ40M钴基高温合金优越.

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材料期刊网

钴基高温合金的循环氧化行为研究

CYCLIC OXIDATION BEHAVIOR OF A COBALT-BASE SUPERALLOY

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