Image Acquisition Method of Nano Precipitates Based on Scanning Electron Microscope Backscattering Mode
A scanning electron microscope, image acquisition technology, applied in the field of iron and steel metallurgy, can solve problems such as difficult observation
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[0044] Preprocess Q460 steel into 300μm-thick sheets by wire electric discharge cutting, and use 400#, 800#, 1200#, 1500#, 2000# silicon carbide metallographic sandpaper to polish and thin it to 80μm; use a punching machine to punch it into a diameter It is a small disc of 3mm, and ground until both sides are flat; use an alcohol solution with a volume fraction of 5% perchloric acid and 2.5% glycerin at -25°C, 20V constant voltage electrolytic double-jet thinning for 60s; the sample after double-spraying Wash in absolute ethanol for 3 times, corrode with 4% nitric acid alcohol at -20°C, and then use absolute ethanol to clean, and finally dry the surface of the sample with absolute ethanol with an ear washing ball, and examine it under a scanning electron microscope. Observe the morphology of nano-scale carbides, where the scanning electron microscope acceleration voltage is 9kV, and the working distance is 8mm, such as figure 1 shown.
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