Observation method of niobium-tungsten-molybdenum alloy metallographic structure
A technology of metallographic structure and molybdenum alloy, which is applied in the field of observing the metallographic structure of niobium-tungsten-molybdenum alloy, can solve the problems of difficult to obtain a clear structure of the metallographic sample of niobium-tungsten-molybdenum alloy, and achieves easy operation and reduced size. Possibility of erosion pit, effect of reducing the amount of corrosion
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Embodiment 1
[0020] Step 1. Machine the observation surface of the 10mm×10mm niobium-tungsten-molybdenum alloy sample into a plane, and then use 150 # , 700 # and 1000 # The metallographic water sandpaper is ground step by step, and the grinding direction is rotated 90° every time the grain size sandpaper is changed to ensure that the last grinding trace is completely eliminated, and the sand grains on the sample are washed away after grinding;
[0021] Step 2. Place the niobium-tungsten-molybdenum alloy sample that has been washed out of the sand grains in step 1 on the polishing machine, and use Cr 2 o 3 Solution and diamond powder with a particle size of 2.5 μm are mechanically polished until the surface of the niobium-tungsten-molybdenum alloy sample is free of scratches and drags;
[0022] Step 3, immerse the mechanically polished niobium-tungsten-molybdenum alloy sample in step 2 in the polishing solution for 3s chemical polishing, and then rinse it with clear water; the polishing...
Embodiment 2
[0027] Step 1. Machine the observation surface of the 10mm×10mm niobium-tungsten-molybdenum alloy sample into a plane, and then use 150 # , 700 # and 1000 # The metallographic water sandpaper is ground step by step, and the grinding direction is rotated 90° every time the grain size sandpaper is changed to ensure that the last grinding trace is completely eliminated, and the sand grains on the sample are washed away after grinding;
[0028] Step 2. Place the niobium-tungsten-molybdenum alloy sample that has been washed out of the sand grains in step 1 on the polishing machine, and use Cr 2 o 3 Solution and diamond powder with a particle size of 2.5 μm are mechanically polished until the surface of the niobium-tungsten-molybdenum alloy sample is free of scratches and drags;
[0029] Step 3, immerse the mechanically polished niobium-tungsten-molybdenum alloy sample in step 2 in the polishing solution and perform chemical polishing for 4s, then rinse with clear water; the poli...
Embodiment 3
[0034] Step 1. Machine the observation surface of the 10mm×10mm niobium-tungsten-molybdenum alloy sample into a plane, and then use 150 # , 700 # and 1000 # The metallographic water sandpaper is ground step by step, and the grinding direction is rotated 90° every time the grain size sandpaper is changed to ensure that the last grinding trace is completely eliminated, and the sand grains on the sample are washed away after grinding;
[0035] Step 2. Place the niobium-tungsten-molybdenum alloy sample that has been washed out of the sand grains in step 1 on the polishing machine, and use Cr 2 o 3 Solution and diamond powder with a particle size of 2.5 μm are mechanically polished until the surface of the niobium-tungsten-molybdenum alloy sample is free of scratches and drags;
[0036] Step 3, immerse the mechanically polished niobium-tungsten-molybdenum alloy sample in step 2 in the polishing solution for 5s chemical polishing, then rinse it with clear water; the polishing sol...
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