DZ40M钴基合金的高温氧化  

HIGH TEMPERATURE OXIDATION OF DZ40M ALLOY

作　　者：刘培生[1] 陈国锋[2] 梁开明[1] 

机构地区：[1]清华大学材料科学与工程系,北京100084 [2]中国科学院金属研究所金属腐蚀与防护国家重点实验室,沈阳110015

出　　处：《中国腐蚀与防护学报》1999年第6期339-344,共6页Journal of Chinese Society For Corrosion and Protection

摘　　要：测定了ＤＺ４０Ｍ 钴基合金在９００ ～１１００ ℃空气中的氧化动力学曲线，观察分析了各温度下经不同时间氧化后合金的表面氧化物形貌和组成。该合金在９００ 和１０００ ℃的静态氧化较好地符合抛物线规律，而在１０５０ 和１１００ ℃时由于氧化皮严重开裂和剥落而近乎呈直线发展。两者的氧化层形成机制有所不同，９００ 和１０００ ℃的后期氧化产物以Ｃｒ２Ｏ３ 为主，形成连续致密的保护层；１０５０ 和１１００ ℃的后期氧化产物以ＣｏＣｒ２Ｏ４ 为主，不形成完整的Ｃｒ２Ｏ３ 保护层。The oxidation kinetics of Co based superalloy DZ40M in air at 900～1100℃ has been determined, and the oxide compositions at different exposure temperatures for various times have been examined by XRD. The kinetics indicated that this alloy followed the parabolic law at 900 and 1000℃ during isothermal oxidation, and followed the nearly linear law at 1050 and 1100℃ due to serious cracking and spalling off of the oxide scales. The kinetic behavior of the alloy at all exposure temperatures was affected greatly by the configuration of Cr 2O 3 in outer oxide scale. The formation mechanism of oxide scale at 900 and 1000℃ differed from that at 1050 and 1100℃, with the former having a continuous Cr 2O 3 layer.

关 键 词：钴基合金 DZ40M合金 高温氧化 

分 类 号：TG172.82[金属学及工艺—金属表面处理] TG146.16[金属学及工艺—金属学]