离心压缩机2级叶轮断裂失效分析  

Fracture failure analysis for centrifugal compressor 2 step leafwheel

作　　者：王亚勤[1] 王志明[1] 

机构地区：[1]沈阳铸造研究所,沈阳110022

出　　处：《现代制造工程》2006年第1期116-117,共2页Modern Manufacturing Engineering

摘　　要：采用宏观、微观及SEM等分析方法,对离心压缩机2级叶轮断裂失效原因进行分析。结果表明,离心压缩机叶轮断裂原因是由于断裂源处表面脱碳,存在大量铁素体,使叶轮在该处硬度、强度及耐疲劳性能明显下降,难以承受压缩机工作状态对其产生的应力作用,形成疲劳方式开裂。The analysis of fracture failure for centrifugal compressor 2 step leaf wheel were made by means of macro examination and microstructure examination. The results showed that the reason of fracture failure is caused by the divorce carbon of crack source zone surface, a large number of ferrite in the microstructure, the hardness strength and resist fatigue property of leaf wheel in this place obvious fall down, which is difficult to bear the stress action in compressor operating condition, so it forms fatigue fashion fracture.

关 键 词：叶轮 铁素体 脱碳 疲劳断裂 

分 类 号：TG157[金属学及工艺—热处理]