摘要
为了找出某数控机床轮齿的断裂失效原因,采用金相显微镜、扫描电镜和硬度计等手段,对断裂齿轮进行了理化检测与分析。结果表明,数控机床轮齿的化学成分符合材料的规定要求;金相组织未见异常,渗碳层深度满足要求;数控机床齿轮的失效方式为疲劳断裂,裂纹起始于轮齿内部的大尺寸的非金属夹杂物。在齿轮的生产工艺改良过程中,应充分重视避免夹杂物的残留。
In order to find out the fracture failure reason of a CNC machine tool tooth,the fracture gear is detected and analyzed by means of metallographic microscope,scanning electron microscope and hardness tester.The results show that the chemical composition of CNC machine tool gear meets the requirements of material;the metallographic structure is normal;the carburized layer depth meets the requirements;the failure mode of CNC machine tool gear is fatigue fracture,and the crack starts from the large-scale non-metallic inclusion inside the gear tooth.In the process of gear production process improvement,it should pay attention to avoid the residual inclusions.
作者
刘伟
王明忠
Liu Wei;Wang Mingzhong(Mechanical Engineering,Maanshan Technical College,Maanshan 243031,China;Mechanical Engineering,The Open University of Fujian,Fuzhou 350013,China)
出处
《湖南文理学院学报（自然科学版）》
CAS
2021年第4期48-52,共5页
Journal of Hunan University of Arts and Science(Science and Technology)
基金
安徽省高等学校省级质量工程项目(2020jyxm1915)。
关键词
数控机床
齿轮
断裂
失效分析
CNC machine tool
gear
fracture
failure analysis
