铬、铝、硅对铁基高温合金抗氧化性能的影响  

Effects of Chromium,Aluminium and Silicon on Oxidation Resistance of Fe-base Superalloy

作　　者：王海涛[1] 张国玲[1] 于化顺[1] 王少卿[1] 闵光辉[1] 

机构地区：[1]山东大学材料学院材料液态结构及其遗传性教育部重点实验室,济南250061

出　　处：《材料工程》2008年第12期73-77,共5页Journal of Materials Engineering

摘　　要：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。The effects of chromium, aluminium and silicon on the oxidation resistance were studied by orthogonal experiment method. The results show that the content of Cr,Al,Si in test alloys for stable oxidation resistance should be added more than 17%Cr,4%Al and 1.5%Si respectively. The most affecting element for oxidation resistance is Si among stoichiometric Cr,Al and Si,the following one is Al, and the last one is Cr. The flat and compact structure, fine and even grains endow it with good oxidation resistance, otherwise the scales are bad in oxidation resistance. High-temperature oxidation resistance depends on the composition of the scales on test alloys. The compounded scales of Cr2O3, Al2O3, SiO2 and Fe（Ni）Cr2O4 possess strong oxidation resistance at 1250℃ ,but it become poor without Al2O3 or SiO2.

关 键 词：耐热钢 铁基高温合金 氧化膜 抗氧化性 

分 类 号：TG142.73[一般工业技术—材料科学与工程]