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。
Macro examination, metallographic microscope, microhardness tester and X ray diffractometer were utilized to study the failure reasons for connecting rode bearing bush of automobile engine.
用显微硬度仪测定合金的硬度，分析其硬度随氧化时间变化的情况，绘制该钢的显微硬度随时间变化的曲线。
The hardness of the alloy following the change of time was analyzed by micro- hardness instrument and the alloy's hardness curve following the change of time was drawn.
采用宏观分析、显微检验和硬度测定对压铸模进行了失效分析。
This failure analysis was performed by using macro check, micrography and hardness measurement.
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