某离心式风扇断裂原因分析  

Cause Analysis on Fracture of a Centrifugal Fan

作　　者：赵美玲 董金元 ZHAO Meiling;DONG Jinyuan(Testing Center of CRRC Ziyang Co.,Ltd.,Ziyang 641300,China;Chengdu Hairui Product Quality Technology Test Co.,Ltd.,Chengdu 610500,China)

机构地区：[1]中车资阳机车有限公司检测中心,资阳641300 [2]成都市海瑞产品质量技术检测有限公司,成都610500

出　　处：《理化检验（物理分册）》2020年第4期35-40,共6页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：某离心式风扇在运行过程中发生断裂,采用宏观分析、扫描电镜分析、化学成分分析、拉伸性能试验、金相检验、硬度测试等方法对风扇的断裂原因进行了分析。结果表明:盖板和风叶塞焊处产生疲劳开裂,在后续的运行过程中,疲劳源区碾合磨损严重,随着风扇的继续运行,疲劳裂纹扩展至盖板上,使得该离心式风扇最终发生断裂。A centrifugal fan fractured during operation.The fracture causes of fans were analyzed by means of macro analysis,scanning electron microscope analysis,chemical composition analysis,tensile property test,metallographic examination and hardness test.The results show that fatigue crack occurred at the plug weld of cover plate and blade.In the subsequent operation,the source zone of fatigue was severely worn.With the continuous operation of the fan,the fatigue cracks propagated to the cover plate,which made the centrifugal fan finally fracture.

关 键 词：离心式风扇 断裂 风叶 疲劳开裂 磨损 

分 类 号：TG115[金属学及工艺—物理冶金]