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.
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桿轴瓦的失效进行了分析。
can operate microscope and microhardness tester correctly.
能够正确使用显微镜和显微硬度计。
microstructure and surface morphology of the oxynitriding layers were studied by sem, xrd, microhardness tester and digital camera.
利用sem、xrd、显微硬度计和数码相机等研究氧氮共渗层的微观组织、结构及表面形貌。
the microstructure and mechanic performances of the coating were tested by sem, xrd, edax, microhardness tester and other equipments.
microhardness was measured by means of a microhardness tester and abrasive wear resistance was tested by ml-100 wear testing machine.
利用显微硬度计、ml-100磨料磨损试验机考察非光滑表面的硬度及耐磨性。
employed by optical microscope, scanning electron microscope, microhardness tester and x ray diffraction instrument, the isothermal decomposition process of high nitrogen austenite was investigated.