锻压技术

某型号前轴疲劳试验及结果分析

英文标题：Fatigue test and result analysis on a vehicle front axle

作者：王梁陈国强郑明玉秦学枫陈文琳陈力

分类号：TG115.5

出版年,卷(期):页码：2017,42(5):119-122

摘要：

为测试前轴的疲劳寿命，采用台架试验装置对某型号汽车前轴进行了试验，仅运行19.9万次就发生断裂。通过对断口的观察分析、断口部位的金相分析、硬度检测等方式，确定了前轴的失效模式，并对其断裂失效原因进行了分析。研究结果表明：汽车前轴的断裂性质为疲劳断裂，裂纹源起源于锻件飞边表面，该处存在较明显的沟槽;锻件表面的加工沟槽形成的附加应力集中是造成前轴疲劳断裂的主要原因;加工沟槽可能由于切边模的磨损而产生，因此切边模刃口需及时修整。

For measuring the fatigue life, a vehicle front axle was tested by platform experimental device and cracked by running 199 thousand times. Then, the failure mode of the axle was determined by fracture surface examination, metallographic analysis and hardness test, and the causes of failure and fracture were analyzed. The results show that the fracture mode of the axle is fatigue fracture, and the cracks originate from the forging flash surface with obvious groove. The additive structural stress concentration formed by the machining groove is the main causes resulting in the fatigue fracture of the front axle. However, processing groove may be produced by the wear of the cutting die, so the cutting die blade should be repaired timely.

基金项目：

教育部科学技术研究重大项目(311025)

王梁（1991- ），男，硕士研究生陈文琳（1963- ），女，博士，教授

参考文献：

［1］Jafari A, Khanali M, Mobli H, et al. Stress analysis of front axle of JD 955 combine harvester under static loading[J]. Journal of Agriculture & Social Sciences, 2010,（8）:359-364.
［2］欧阳刚，黄赣萍. 高线精轧棍轴疲劳断裂分析与处理[J]. 江西冶金，2016，36(3):35-40.Ouyang G, Huang G P. High speed wire finishing roller shaft fatigue fracture analysis and processing[J]. Jiangxi Metallurgy, 2016, 36(3):35-40.
［3］ Perumal V, Palanivelu S, Mookherjee S P, et al. Influence of forging process on fatigue properties of AISI 4140 steel axle component[J]. Journal of Engineering Materials and Technology, 2012,134(1):172-175.
［4］李伟，陈文琳，吴跃，等. 40 Cr商用车前轴早期断裂失效分析[J]. 塑性工程学报，2014,21(5)：88-92.Li W, Chen W L, Wu Y, et al. Early failure analysis of 40Cr commercial vehicle front axle [J]. Journal of Plasticity Engineering, 2014,21(5):88-92.
［5］李伟. 重型商用车前轴成形工艺与微观组织演变研究[D]. 合肥:合肥工业大学，2015.Li W. Heavy Duty Commercial Vehicle Front Axle Research on Forming Process and Microstructure Evolution [D]. Hefei:Hefei University of Technology, 2015.
［6］周敏. 5CrNiMo热环轧芯辊断裂失效分析[J]. 锻压技术，2015，40(5) :145-148.Zhou M. Failure analysis on the fracture of hot ring-rolling core roller 5CrNiMo[J]. Forging & Stamping Technology, 2015, 40(5) :145-148.
［7］商国强，王新南，费跃，等. TB8钛合金紧固件疲劳断裂分析[J]. 稀有金属，2016，40(7)：640-646.Shang G Q, Wang X N, Fei Y, et al. Analysis of fatigue and fracture of TB8 titanium alloy fasteners [J]. Chinese Journal of Rare Metals, 2016, 40(7):640-646.
［8］谢晖，吴任，王诗恩，等. 高强钢冲压模具凸模疲劳寿命分析及优化设计[J]. 塑性工程学报，2015，22(6)：64-70. Xie H, Wu R, Wang S E, et al. Fatigue analysis and structure optimization design on punch of high strength steel stamping die[J]. Journal of Plasticity Engineering, 2015,22(6):64-70.
［9］王立民, 彭梦都, 雷玖芳. 45CrMoV 钢冲击断口形貌[J]. 塑性工程学报, 2015,22(1):133-136.Wang L M, Peng M D, Lei J F. Investigation on impact fracture surface of 45CrMoV steel[J]. Journal of Plasticity Engineering, 2015,22(1):133-136.
［10］赵光菊，郭献忠，毛宗良. Ti6Al4V高锁螺栓疲劳断口形貌及断口分析[J]. 贵州大学学报，2012，29(3):50-52.Zhao G J, Guo X Z, Mao Z L. Study on the fatigue fracture of hi-look pins in Ti6Al4V titanium alloy[J]. Journal of Guizhou University, 2012, 29(3):50-52.
［11］张大伟，高彩茹，肖宝亮，等. 500 MPa级高疲劳寿命汽车轮辐钢的开发[J]. 塑性工程学报，2015，22(5)：114-117.Zhang D W, Gao C R, Xiao B L, et al. The development of 500 MPa grade wheels arm steel with high fatigue property [J]. Journal of Plasticity Engineering, 2015,22(5):114-117.
［12］赵荣国，罗希延，蒋永洲，等. 航空发动机涡轮盘用 GH4133B合金疲劳损伤与断口分析[J]. 机械工程学报，2011，47(6)：92-100.Zhao R G, Luo X Y, Jiang Y Z, et al. Analysis on fatigue damage and fractography of GH4133B superalloy used in turbine disk of aero-engine[J]. Chinese Journal of Mechanical Engineering, 2011,47(6):92-100.
［13］ GB/T 4336—2016，碳素钢和中低合金钢多元素含量的测定火花放电原子发射光谱法(常规法)[S].GB/T 4336—2016，Carbon and low-alloy steel—Determination of multi-element contents—Spark discharge atomic emission spectrometric method (routine method) [S].
［14］秦广冲，徐善华，何羽玲，等. 初、次级蚀坑三维变化对钢板应力集中系数的影响[J]. 材料科学与工程学报，2015，33(2)：251-256.Qin G C, Xu S H, He Y L, et al. Effect of dimensional variations of primary and secondary pits on stress concentration factor[J]. Journal of Materials Science and Engineering, 2015, 33(2):251-256.

服务与反馈：

【文章下载】【加入收藏】