Fe_3Al基合金在含SO_2和SiO_2颗粒高温气流中的冲刷腐蚀  

EROSION-CORROSION OF Fe_3Al BASED ALLOYS IN AIR FLOW CONTAINING SO_2 AND SiO_2 PARTICLES

作　　者：范敏[1] 余新泉[1] 孙扬善[1] 

机构地区：[1]东南大学材料系,南京210096

出　　处：《中国腐蚀与防护学报》2000年第3期155-160,共6页Journal of Chinese Society For Corrosion and Protection

摘　　要：研究了几种Fe3Al基合金的耐冲蚀性能。冲蚀试验在一个水平装置中进行 ,其内部通入含高浓度SO2 和SiO2 颗粒的高温气流 ,研究结果表明 ,在 60 0 - 80 0℃温度范围内 ,Fe3Al基合金的抗冲蚀性能明显优于镍基和钴基高温合金。SEM观察表明 ,Fe3Al基合金的冲蚀过程是片屑的形成 ,而对于镍基和钴基合金 ,冲蚀试样表面则呈现犁削形貌。加少量的钨。The erosion corrosion resistance of some Fe 3Al based alloys at high temperatures was investigated. Erosion corrosion experiments were performed in a horizontal system through which the high temperature air flow containing highly concentrated SO 2 and fine SiO 2 particles was blasted off. The results indicated that Fe 3Al based alloys had much higher erosion corrosion resistance than nickel and cobalt based alloys at temperature between 600 800℃. SEM observations on the eroded specimens of different alloys revealed that the erosion corrosion of Fe 3Al based alloys was associated with flake formation. For nickel and cobalt based alloys, the surface of eroded specimens showed ploughing morphology. Small amount addition of tungsten, molybdenum or niobium to the Fe 3Al based alloys resulted in the further increase in the erosion corrosion resistance.

关 键 词：冲刷腐蚀 FE3AL基合金 二氧化硫 高温气流 

分 类 号：TG172.9[金属学及工艺—金属表面处理] TG142.72[金属学及工艺—金属学]