低偏析高温合金M41的高温氧化性能研究  

HIGH TEMPERATURE OXIDATION PERFORMANCE OF SUPERALLOY M41

作　　者：李铁藩[1] 胡武生[1] 沈嘉年[1] 

机构地区：[1]中国科学院金属腐蚀与防护研究所腐蚀科学开放实验室

出　　处：《金属学报》1995年第12期B527-B534,共8页Acta Metallurgica Sinica

摘　　要：用Ｍ１７和Ｋ３合金作对比，着重研究了低偏析镍基铸造高温合金Ｍ４１的高温氧化性能进行了恒温氧化、循环氧化以及Ｘ射线衍时（ＸＲＤ）、扫描电镜（ＳＥＭ）、能谱分析（ＥＤＡＸ）等实验，结果表明，Ｍ４１合金的氧化速度随温度升高以加速度方式增长，但小于Ｋ３合金，温度越高，差别越大；在１０００℃以上，Ｍ４１合金的氧化动力学规律明显偏低于抛物线规律．Ｍ４１合金循环氧化性能优于Ｍ１７合金，氧化膜粘附性较好，基本不脱落，在过渡氧化阶段，该合金主要形成Ｎｉ和Ｃｒ的氧化物：稳态氧化阶段的氧化层主要由连续致密的Ｃｒ２Ｏ３，外氧化层和树根状Ａｌ２Ｏ３内氧化层构成．内氧化随时间延长，温度升高而加剧，离外氧化层／基体界面越近，内氧化物颗粒越细、越多．Compared with alloy M17 and K3, high temperature oxidation performance of low segregation cast nickel base superalloy M41 has been investigated by means of isothermial and cyclic oxidation, XRD, SEM, EDXA and X-ray element maps. Results show that oxidation rate of the alloy M41 accelerates with the rise of temperature, but is lower than that of the alloy K3. Scale adherance of the alloy M41 is better than that of the alloy K3 and M17, so its cyclic oxidation performance is superior to that of alloy M17. Oxidation kinetics of alloy M41 obviously deviate from parabolic law, because votilization of CrO3is severe above 1000℃ .The higher temperature is, the more severe volatilization is, so the more obvious deviation is. Volatilization of CrO3 is minor below 1000℃ ,so deviation is small. In transient oxidation stage, the alloy M41 primarily forms oxides of Ni and Cr, and in steady oxidation stage, scale consists mainly of a continuous and compact Cr2O3 at the outer layer and a tree root shaped Al2O3 at the inner oxidation layer. The internal oxidation becomes more severe with the rise of temperature and the prolongation of time.The nearer it is from the outer oxide layer/matrix interface, the more and smaller the particles of internal oxidation are. This article syntheticly analyses the results of experiments.

关 键 词：镍基 铸造 耐热合金 氧化性 内氧化 

分 类 号：TG132.32[一般工业技术—材料科学与工程]