摘要
车桥半轴齿轮是差速器的重要组成部分,在差速器工作中扮演着十分重要的角色。针对断裂的半轴齿轮进行断口形貌、成分及硬度分析,并结合有限元模拟分析齿轮失效的原因。结果表明:齿轮渗碳层厚度约0.8 mm,渗碳层显微组织主要为硬度较高的针状马氏体和部分残留奥氏体,硬度达785.1 N/mm 2,表面硬化处理与渗碳处理基本符合工况要求。通过ABAQUS模拟发现半轴齿轮最易断裂处位于齿根最靠近边角的部位,与实际工况吻合。
Axle gears are an important part of the differential mechanism,and play a very important role in the work of the differential mechanism.In this paper,the morphology analysis,composition analysis and hardness analysis of the fractured half-shaft gear are carried out,and the cause of the gear failure is analyzed in conjunction with the finite element simulation analysis.The results show that the thickness of the carburized layer of the gear is about 0.8 mm.The microstructure of the carburized layer is mainly needle-shaped martensite with higher hardness and part of retained austenite.The hardness reaches 785.1 N/mm 2.The surface hardening treatment and carburization treatment are basically meet the requirements of working conditions.Through ABAQUS simulation,it is found that the most easily broken part of the half-shaft gear is located at the lowermost corner of the tooth root,which is consistent with the actual working condition where the fracture occurs.
作者
徐滨
XU Bin(School of Mechanical and Electrical Engineering,Hefei Polytechnic University,Hefei 238000,China)
出处
《河南工程学院学报（自然科学版）》
2021年第1期59-61,69,共4页
Journal of Henan University of Engineering：Natural Science Edition
基金
安徽省基层教研室示范项目(2018jyssf090)。
