Fracture tooth of gear shaft in well drilling pump was analysed by chemical analysis, mechanical testing metallographicexamination 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。
3
The combustion resistance properties of TC4 and TC11 titanium alloys had been studied by means of titanium combustion testing equipment and metallographicexamination.