2Cr13与1Cr18Ni9Ti两种材质喷嘴环热疲劳性能对比  

Comparative Thermal-Fatigue Characteristics of the Jet of 2Cr13 and 1Cr18Ni9Ti Alloy

作　　者：董显平[1] 郁金星[1] 张源虎 孙景斌 徐建英 

机构地区：[1]上海交通大学教育部高温材料及高温测试开放实验室,上海200030 [2]铁道部机务局,北京100844

出　　处：《机械工程材料》1999年第5期27-29,41,共4页Materials For Mechanical Engineering

摘　　要：在试验室条件下观察了２Ｃｒ１３ 与１Ｃｒ１８Ｎｉ９Ｔｉ两种材质整铸式喷嘴环的热疲劳行为。结果表明，在特定环境条件下工作的喷嘴环，２Ｃｒ１３ 材质的抗热疲劳性能优于１Ｃｒ１８Ｎｉ９Ｔｉ材质，前者喷嘴环在一定次数热循环后无开裂现象，后者喷嘴环严重开裂。其热疲劳裂纹在构件薄弱处出现，萌生于晶界，并沿晶界扩展。The thermal fatigue behaviors of the cast jet of 2Cr13 and 1Cr18Ni9Ti alloy were observed by laboratory testing. The results show that thermal fatigue resistance of 2Cr13 alloy is superior to that of 1Cr18Ni9Ti alloy under a special environment. After a certain number of thermal cycles, few cracks were found in the jet of 2Cr13 alloy, the cracks appeared in the jet of 1Cr18Ni9Ti alloy were serious. Thermal fatigue cracks which occurred to the weak position were intercrystalline in origin and mode of propagation.

关 键 词：喷嘴环 热疲劳 涡轮增压器 内燃机车 

分 类 号：U262.067[机械工程—车辆工程]