Fracture tooth of gear shaft in well drilling pump was analysed by chemical analysis, mechanical testing metallographic examination macro and microfractography.
采用化学成分分析、力学性能测定、金相检验以及断口宏、微观分析等方法，对钻井泵齿轮轴断齿进行了分析。
The failure analysis consisted of a strength analysis, a macro-fracture surface analysis, a metallurgical microscope and scanning electron microscope analysis.
分析包括结构强度分析、宏观断口分析、金相分析和扫描电镜分析等。
The macro and micro analysis of fracture indicates that it produces fracture because it doesn′t avoid welding stress in time.
根据断口的宏、微观形貌，认为油管焊接后未及时消除焊接应力，产生了淬硬裂纹；
The reason of roll fracture has been analyzed by means of chemical composition analysis, macro fractograph, low magnification structure and microstructure examination.
采用化学成分、宏观断口、低倍组织及金相组织等分析方法对轧辊断裂原因进行了分析。
Based on the fracture site investigation and macro-rod fracture analysis, the welding rod fracture occurred in the vicinity of the weld fusion line.
通过对最近的一次断裂拉杆现场调查和宏观断口分析，发现断裂发生在拉杆的补焊焊缝熔合线附近。
On the basic of macro-micro analysis of fracture a new fatigue-creep interaction map called first type of interaction map was constructed.
在宏观与微观分析相结合的基础上建立了第一类断裂特征图。
Analysis on metallography, macro and fracture appearance were carried out on broken link in motorbike engine.
对断裂的摩托车发动机连杆进行宏观、金相及断口分析。
This paper presents the macro and micro analysis of pearlite ductile iron small energy multiimpact fracture surface a group of it's microscope photographs are supplied.
本文对珠光体球铁常温下小能量多次冲击断口进行了宏观和微观的分析；提供了一组珠光体球铁小能多冲断口微观形貌的电子显微镜照片；
This paper presents the macro and micro analysis of pearlite ductile iron small energy multiimpact fracture surface a group of it's microscope photographs are supplied.
本文对珠光体球铁常温下小能量多次冲击断口进行了宏观和微观的分析；提供了一组珠光体球铁小能多冲断口微观形貌的电子显微镜照片；
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