横向稳定杆断裂失效分析  

Fracture Analysis of Stabilizer Bar

作　　者：李卫红 崔忠荣 王福平 马秋[1] 袁成逸 I Wei-hong;CUI Zhong-rong;WANG Fu-ping;MA Qiu;YUAN Cheng-yi(Zhejiang Geely Automobile Research Institute Co.,Ltd.,Ningbo 315336)

机构地区：[1]浙江吉利汽车研究院有限公司,宁波315336

出　　处：《环境技术》2021年第3期70-73,78,共5页Environmental Technology

摘　　要：某车型横向稳定杆在试验过程中发生断裂,为了更好的确定断裂产生的原因,防止再次发生,对稳定杆进行了断口、成分、金相、硬度等分析。结果表明:稳定杆断裂主要原因是由于疲劳断裂引起的,疲劳源附近存在的严重脱碳层及裂纹是断裂的起因,同时内部组织不均匀加速裂纹扩展断裂。A stabilizer bar fractured before overall service life during durability test.In order to better determine the cause of fracture to prevent recurrence,the anti-roll bar with crack was tested by fracture analysis,chemical composition analysis,hardness test and metallographic examination.The results show that the fracture of the failure stabilizer bar was a typical fatigue crack fracture,because of severe decarbonization layers and cracks near the fatigue source result in fracture cause,and then the unstable metallographic accelerate the crack growth.

关 键 词：稳定杆 断裂 脱碳 疲劳 

分 类 号：TG115[金属学及工艺—物理冶金]