The relatively large workload of metallographic analysis lies in the preparation of samples, and the key to sample preparation depends on the grinding and polishing process. We usually encounter some small troubles when using metallographic sandpaper to grind and polish metallographic samples. If not handled properly, it will cost us a lot of labor and time. The editor of Chain Metallography has summarized a few tips. You can give it a try when using metallographic sandpaper to grind and polish metallographic samples, which can make the work easier.

    What should we do when grinding particles with metallographic sandpaper to embed cracks and pores?


When the sample being ground contains cracks or pores, the grinding particles of metallographic sandpaper are easily embedded into the cracks or voids during the grinding process. If not cleaned, they will be carried to the surface of other grade sandpaper, directly affecting the next grinding and polishing process, which is obviously not feasible. In this case, it is a good method to use Ultrasonic cleaning and ultrasonic cleaning steps to remove abrasives and debris in cracks and pores, which can avoid pollution to the next sample preparation step.


But it should be reminded that for certain soft metals and alloys (especially precious metals), excessive ultrasonic cleaning vibration should be avoided to prevent damage to their tissues.


How to more easily remove the metallographic sandpaper with adhesive backing from the grinding plate?


The metallographic sandpaper with adhesive backing is worn out, and when it needs to be replaced, it is not a labor-saving task to remove a tightly bonded metallographic sandpaper on the grinding disc. It may also have residual adhesive adhering to the grinding disc, which is troublesome and time-consuming to clean. Here is a simple and practical method for everyone. Before removing the metallographic sandpaper, soak it in hot water for a few minutes, and then remove it again. It is easy to remove and there will be very little adhesive residue. Just lightly wipe it with a cloth.


Another method is to apply a little release agent to the grinding disc before pasting a new metallographic sandpaper. After this treatment, the used adhesive metallographic sandpaper can also be easily removed.


You can try these tips, accumulated over time, to make more small experiences convenient for work and make work and life equally enjoyable.