metallographic examination

The metallographic examination of joint in different welding temperature proves that the joint metal on the side of high-speed steel has a gentle structure slope at the800 ℃.

通过对不同温度接头的金相检验证明：在800℃时高速钢一侧组织梯度较小；

The pipe is made of steel X20CrMoV121 ( F12). According to stress analysis and metallographic examination results, a concluding evaluation has been obtained and guides for further safe service set up, together with a residual life expectancy estimation.

该管道的材料是X20CrMoV121（F12），通过应力分析、金相组织检查等方法对该管道的性能进行评估，提出了合理的运行安全性指导意见和剩余寿命估算值。

A synthetic analysis on the cause of longitudinal surface cracking of 20 steel tube blank has been carried out by means of scanning electron microscope, energy spectrometer and metallographic examination.

用扫描电镜能谱仪、金相检验等方法对20钢管坯表面纵向裂纹形成的原因进行了综合分析。

Based upon the filming metallographic examination of the damage on the internal wall of the reaction still, the causes of cracking and grooving damages are analyzed.

根据对反应釜内壁损伤的复膜金相分析，判断釜内壁发生裂纹及沟状损伤的形成原因；

The comprehensive analysis was made of the safety performance of a used hot-wall hydrogenation reaction chamber in non-destructive inspection, analysis of chemical components, measurement of material performance, trend of temper brittleness, and metallographic examination.

通过无损检测、化学成分分析、材料性能测试、回火脆化倾向评定和金相检验等，对一台旧热壁加氢反应器的安全性能进行了综合分析。

An overall technical examination is presented including metallographic examination and corrosion test between crystals.

并对换热器进行金相检查、晶间腐蚀试验等项目全面技术检验。

Measurement on depth of decarburized layer of spheroidized annealing steel by metallographic examination

球化退火态钢脱碳层深度的金相法测定

Fractured translation cam of motor planet reducer was studied by chemical analysis, hardness test and metallographic examination.

介绍了电机行星减速器动凸轮的断裂情况，对断裂动凸轮进行了宏、微观检验。

Chemical composition, hardness, microstructure and pitting defect appearance of the failed bearing rolling elements were studied by methods of chemical analysis, hardness testing, scanning electron microscope and metallographic examination.

采用化学分析、硬度测定、扫描电子显微镜检查和金相分析方法，对失效轴承滚动元件的化学成分、硬度、显微组织和滚动道（面）上的点状缺陷的形貌特征进行了分析。

Metallographic examination of borided 45 steel sample was made by transmission electron microscopy.

用透射电子显微镜对经渗硼的45钢作了观察.

The article studied drum shape deformation of cylindrical body of boiler by methods of chemical analysis and metallographic examination.

采用化学分析及金相检验等方法，对锅炉锅筒产生的鼓包原因进行了分析。

Experimental techniques such as tensile test, metallographic examination, classical corrosion test and polarization curve measurement were used to study the mechanical properties, microstructure and corrosion resistance of tin brass for condensation tube in power plants.

采用拉伸试验、金相显微分析、经典腐蚀试验方法及阳极极化曲线的测定，研究了电厂用锡黄铜冷凝管的力学性能、组织和耐蚀性能。