In the big family of metallographic consumables, there are also many similar functions and consumables, such as metallographic sandpaper and diamond grinding discs. These two types of consumables are used for rough grinding of samples. Many times, our beginners are a bit confused. These two functions are the same, so how should I choose them?


From a professional perspective, the editor of Chain Metallography will share some small experiences with friends to entertain my dear metallographic engineers.


In the preparation process of metallographic samples, in addition to cutting and embedding, the more critical step may be the grinding and polishing process. In the absence of deep and irremovable defects during cutting, the key to inlaying is to grasp the grinding and polishing process. With proficient sample preparation techniques, the quality of sample preparation depends on whether the consumables selected for each grinding and polishing process are appropriate. As metallographic sandpaper and diamond grinding discs are both used for rough grinding processes, there are still differences in their applications. Understanding these differences can help to make appropriate choices.

    The original imported QMAXIS (Kemai) diamond metallographic grinding disc from the United States has high removal rate, good edge protection effect, long service life, and can replace sandpaper. It is a specialized grinding disc for metallographic grinding, especially suitable for grinding high hardness materials. By using this metallographic grinding disc, the surface deformation layer of the sample can be quickly removed, which not only reduces the grinding steps, but also shortens the sample preparation time, saves sandpaper, and reduces the amount of polishing cloth and polishing liquid used. It is especially suitable for materials with high hardness such as cemented carbide, Thermal spraying coating, ceramics, etc

无背胶金相砂纸                          有背胶金相砂纸

    Original imported QMAXIS (Kemai) silicon carbide metallographic sandpaper from the United States&# 8217& Flash; CarbiPaper is a paper based material with strong toughness, good water resistance, uniform and dense distribution of grinding media particles, sharp edges, and high removal rate. When used to grind metallographic specimens, surface scratches and damage are small, which is beneficial for subsequent polishing processes and effectively shortens sample preparation time. The specifications and models are complete, meeting various grinding requirements for metallographic sample preparation. It is a regular consumable in metallographic laboratories.


In summary, compared to diamond grinding discs, the application of metallographic sandpaper in rough grinding depends on the hardness of the material. Material samples with a hardness range of 150HV or above are suitable for diamond grinding discs, while those with a hardness range of 150HV or below, or those with high hardness but good ductility, are better prepared using metallographic sandpaper.


Dear friend, by understanding the respective characteristics of metallographic sandpaper and diamond grinding discs, one can easily use them in practical work. May my sharing bring you some help.