Austenite crystal boundary display method under condition of high-temperature deformation of medium-carbon microalloyed steel
An austenite grain boundary and high-temperature deformation technology, applied in the field of physical detection, can solve the problems of low efficiency and difficulty in displaying austenite grains of high-strength ship plate steel, and achieve the effects of easy operation, guaranteed product performance, and simple method
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[0020] Example 1
[0021] The chemical composition of the sample is as follows: C: 0.32%, Si: 0.25%, Mn: 1.61%, P: 0.012%, S: 0.002%, Ni: 0.006%, Cr: 0.017%, Mo: 0.003% , V: 0.110%, belongs to medium carbon microalloy steel;
[0022] The process and steps of this embodiment are as follows:
[0023] (1) Sample preparation: The sample is deformed at 1100℃, the deformation is 30%, and quenched immediately after deformation. The oxide scale on each surface of the sample is ground off on a grinder, and then the corroded surface is sequentially placed on 180# and 400 #, 600#, 800#, 1000# is finely ground on metallographic sandpaper, and finally the finely ground sample is polished on a polishing machine. The polishing agent is 1.5um diamond polishing paste and water is used as a lubricant. The polished sample is used Rinse with alcohol and observe the corroded surface under a microscope. There are no pits, pits, stains on the surface of the sample, and there are a few scratches.
[0024] ...
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[0026] Example 2
[0027] The chemical composition of the sample is as follows: C: 0.38%, Si: 0.28%, Mn: 1.7%, P: 0.008%, S: 0.004%, Ni: 0.008%, Cr: 0.015%, Mo: 0.008% , V: 0.115%, belongs to medium carbon microalloy steel;
[0028] The process and steps of this embodiment are as follows:
[0029] (1) Sample preparation: The sample is deformed at 900℃ with a deformation amount of 40%. It is quenched immediately after deformation. The oxide scale on each surface of the sample is ground off on a grinder, and then the corroded surface is sequentially placed on 180#, 400#, 600#, 800#, 1000# metallographic sandpaper is finely ground, and finally the finely ground sample is polished on a grinding and polishing machine. The polishing agent is 1.5um diamond polishing paste, and water is used as a lubricant. The sample was cleaned with alcohol, and the corroded surface was observed under a microscope. There were no pits, pits, or stains on the surface of the sample.
[0030] (2) Corrosive ag...
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