汽车转向机小齿轮断齿失效分析  

Pinion fracture analysis for automobile steering gear

作　　者：匡立文 杨卫祥 Kuang Liwen;Yang Weixiang(Bosch Huayu Steering Systems Co.,Ltd.,Shanghai 310000)

机构地区：[1]博世华域转向系统有限公司,上海310000

出　　处：《汽车实用技术》2018年第7期34-36,共3页Automobile Applied Technology

摘　　要：针对转向机横向加载试验中小齿轮发生断齿失效,采用光学显微镜、扫描电子显微镜、X射线能谱分析和维氏硬度测试等方法对小齿轮断齿原因进行分析。结果表明:齿根表面软化点及软化区域的存在是导致齿轮过载断裂的主要原因。其次,较大量的硫化物夹杂是导致齿轮断齿的另一个主要原因。Steering gear pinion appeared teeth fracture at the abuse test via lateral load.The reasons for the fracture were analyzed by optical microscope,scanning electron microscope,X ray fluorescence and hardness tester etc.The result shows the fracture was caused by existence of soft point and zone at the teeth surface,and amounts of sulfide inclusion is another reason for fracture.

关 键 词：转向机小齿轮 断齿 硫化物夹杂 失效分析 

分 类 号：U466[机械工程—车辆工程]