Pearlite steel wire rod austenitic grain size measuring method
A technology of austenite grain size and measurement method, which is applied in the field of determination of austenite grain size of pearlite wire rods, can solve the problems of not considering the original metallographic structure, and not forming the effective range of grain size. , to achieve the effect of simple sample preparation and quantitative reproducibility
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[0029] The present invention will be further described in detail below through specific examples.
[0030] according to figure 1 In the middle position, use wire cutting to cut a small piece from the pearlitic wire rod 1 to be tested as the sample 2, and the interception position is the area near the vertical line of the radius of the cross section of the wire rod 1 (the cross section is about 1 / 4 along the diameter) , the size of sample 2 is 10mm×5mm×2mm (cuboid). After grinding all samples 2 step by step with 240#, 360#, 400#, 800#, 1000#, 1200#, 1500#, 2000# metallographic sandpaper, choose diamonds with a particle size of 5 μm, 2.5 μm and 0.5 μm The polishing agent performs mechanical polishing on sample 2 in turn. Then electrolytic polishing is performed, the electrolyte is 8% perchloric acid ethanol solution, the parameters of electrolytic polishing are: voltage 24V, current 0.35A, polishing time 12s. The preparation requirements of the EBSD sample are: the surface of...
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