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材料工程  2008 

铬、铝、硅对铁基高温合金抗氧化性能的影响

, PP. 73-77

Keywords: 耐热钢,铁基高温合金,氧化膜,抗氧化性

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Abstract:

采用正交设计的实验方法探讨了铬、铝、硅元素含量对铁基高温合金抗氧化性的影响规律.为获得稳定的抗氧化能力,上述各元素的含量应分别高于17%Cr,4%Al,1.5%Si.结果表明当三元素同原子比时对铁基高温合金抗氧化性的影响次序为Si最大,Al次之,Cr最小.结构平坦、组织致密、颗粒细小均匀的氧化膜抗氧化性较好,反之较差.当氧化膜由Cr2O3,Al2O3,SiO2,Fe(Ni)Cr2O4多种氧化物组成复合氧化膜时于1250℃表现为强抗氧化性,当缺少Al2O3或SiO2时表现为弱抗氧化性.

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