Macroexamination, metallographic microscope, microhardness tester and X ray diffractometer were utilized to study the failure reasons for connecting rode bearing bush of automobile engine.
采用宏微观检验、显微硬度测定、X射线衍射等方法对汽车发动机连杆轴瓦的失效进行了分析。
2
The macro profile and physicochemical examination of the tread oblique crack shows that the crack falls into the category of rolling contact fatigue type.
踏面斜裂纹及断口的宏观形貌和理化检验与分析表明，踏面斜裂纹伤损属于滚动接触疲劳裂纹伤损类型。
3
Fracture tooth of gear shaft in well drilling pump was analysed by chemical analysis, mechanical testing metallographic examinationmacro and microfractography.