Cracking Reason of Automobile Hub Bearing Flange Inner Ring
-
摘要: 某厂生产过程中发现一批汽车轮毂轴承法兰在大盘面倒圆角区域发生开裂，采用宏观检查、化学成分分析、硬度测试、金相检验、扫描电镜及能谱分析等方法对开裂原因进行了分析。结果表明：该批轮毂轴承法兰内圈开裂主要是由于连铸坯头尾的切除量不足导致原材料中存在残余缩孔缺陷；在锻造过程中裂纹从缩孔处萌生并沿材料变形方向不断扩展，最终导致法兰内圈开裂。建议加强对原材料的入厂质量检验，重点关注其低倍组织及缩孔缺陷。Abstract: A batch of automobile hub bearing flanges produced by a factory cracked in the radius area of the large plate during the production. The cracking reasons were analyzed by means of macroscopic examination, chemical composition analysis, hardness test, metallographic examination, scanning electron microscope and energy spectrum analysis. The results show that the cracking of the hub bearing flange inner ring was mainly due to the residual shrinkage defects in raw materials caused by insufficient cutting volume at head and end area of the continuous casting slab. In the process of forging, the crack initiated from the shrinkage cavity and propagated along the deformation direction of the material, eventually leading to the cracking of the flange inner ring. It was recommended to strengthen the incoming quality inspection of raw materials, focusing on its macrostructure and shrinkage defects.
-
Keywords:
- hub bearing flange /
- cracking failure /
- forging /
- residual shrinkage cavity
-
-
[1] 唐洁.基于弹流润滑理论的轮毂轴承力学性能及疲劳寿命研究[D].南京:南京航空航天大学,2018. [2] 袁腾飞.轮毂轴承结构改进设计与疲劳寿命分析[D].重庆:重庆理工大学,2016. [3] 许佩宜.轮毂轴承法兰内圈的感应热处理研究[D].上海:上海交通大学,2015. [4] 王伟.某型轿车轮毂轴承力学性能分析及优化设计[D].南京:南京航空航天大学,2014. [5] 宋祥峰.轮毂轴承的定义、分类和技术发展趋势[J].汽车实用技术,2018(12):178-180. [6] 刘兵.汽车第三代轮毂轴承游隙检测技术研究[D].杭州:浙江农林大学,2018. [7] 周旭,汪峰,邱宝象.第三代轮毂轴承单元密封件的设计与性能验证[J].轴承,2012(7):62-64. [8] 刘汝卫,张钢,殷庆振,等.汽车轮毂轴承的发展现状及趋势[J].现代机械,2009(6):78-80. [9] 蒋兴奇,黄志强.NSK第三代轮毂轴承的开发[J].轴承,2005(4):46-49. [10] 胡春燕,刘新灵.某汽车轮毂轴断裂原因分析[J].材料工程,2012,40(11):23-26. [11] 倪兆荣,杨绍荣,郑跃刚.轿车轮毂轴承法兰盘断裂失效分析[J].机械工程材料,2015,39(6):111-114. [12] 许冬冬,王红霞,李荣德.套圈锻造过烧导致的轴承早期失效[J].洛阳工业高等专科学校学报,2005,15(1):14-15. [13] 陈渝.汽车变速器输入轴校直断裂失效分析[J].理化检验(物理分册),2014,50(12):922-925.
计量
- 文章访问数: 9
- HTML全文浏览量: 0
- PDF下载量: 1
下载:
