The effects of cooling velocity, the lead content and the gravity on the microstructures of Al Pb alloy were discussed based on the results of optical microscope, SEM and quantitative metallography.
利用光学显微镜、扫描电镜、定量金相等技术研究了冷却速度、铅含量、重力作用等对铝铅合金显微组织的影响。
The microstructures of the laser-melted H13 steel have been studied by means of optical metallography, SEM and XRD. And mechanical properties have been measured.
采用光学金相、SEM和XRD等方法研究了经激光熔凝处理的H1 3钢的显微组织，并对其性能进行了测试。
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