By using spectrum analyzer,optical microscope and SEM,chemical composition and microhardness of tube material were tested,and metallurgical structure and fracture pattern of the joint were observed.
英
美
释义
利用光谱分析仪、光学显微镜和扫描电镜等测试手段,测试了炉管材料的化学成分和显微硬度,观察了失效接头的金相组织和断口形貌。
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