Metallography is the study of the microstructure of metals and alloys by means of the metallurgical microscope and the electron microscope.
金相学是用金相显微镜和电子显微镜对金属和合金的显微结构的研究。
To adopt the metallography hardness method to study microstructure transformation of medial carbon steel 40 being heated and cooled.
采用金相-硬度法研究了中碳钢（40钢）在加热和冷却时的组织转变。
The paper has provided theoretical basis and computation method of the four measuring items of microstructure for digital image processing by studying quantitative metallography.
通过研究定量金相技术为半固态微观组织的固相率，晶粒大小，晶粒尺寸分布和形状分布的图像处理提供了理论依据和计算方法。
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