In the large family of consumables for metallographic sample grinding and polishing, metallographic sandpaper is a widely used consumable, not only because its grinding performance can meet the needs of most material sample preparation, but also because of its low cost, it is widely favored. Nevertheless, metallographic sandpaper is not multifunctional, and for certain special materials, metallographic sandpaper is not very suitable. The prepared samples are difficult to meet the requirements. Therefore, in this case, metallographic sandpaper should be carefully selected.


Imagine when choosing an inappropriate metallographic sandpaper and wasting time and effort, and unable to prepare a perfect sample, feeling frustrated is a big drop, reducing work efficiency is inevitable, affecting production is possible, and being criticized is perhaps a drop&hellip& Hellip;, Anyway, it is necessary for us to master more relevant knowledge and valuable experience, so that all of these may not have happened during conversation and laughter! When must metallographic sandpaper be carefully selected?


[Dry Goods]: For hard materials, such as sintered carbides, ceramics, etc; There are also materials such as microelectronics, circuit boards, and optical fibers. When grinding samples, it is important to carefully choose metallographic sandpaper because it can cause trouble if not properly handled.


When grinding and preparing the surface of a sample, it is necessary to first select the grinding consumables based on the preparation plan. Factors that need to be considered include the amount of material removed, the durability of the grinding surface, as well as the material type, physical and chemical properties of the prepared sample, and many other factors.

    For most metal and alloy materials, metallographic sandpaper can provide fast material removal speed and hardly cause deformation. The perfect grinding surface is born in the rustling sound of metallographic sandpaper friction with the sample surface, which is very suitable. At this time, metallographic sandpaper can be used with confidence.


However, for hard and brittle materials such as sintered carbides and ceramics, caution should be exercised when using metal bonded or resin bonded diamond grinding discs for grinding. This may be more effective than using metallographic sandpaper, and the surface of the sample will be ground faster and better. In addition, the service life of diamond grinding discs is longer, and the comprehensive preparation cost of samples is relatively lower.


For materials such as microelectronics, circuit boards, and optical fibers, metallographic sandpaper needs to be carefully selected because it is prone to embedding, causing the surface of the sample to be damaged by the embedding of grinding medium particles; It's unbearable to see;. At this point, if we choose diamond polishing film (also known as diamond film or diamond polishing sheet) for grinding, it will bring us unexpected surprises. Diamond polishing film has excellent grinding and polishing ability, which almost does not cause the embedding of grinding particles in the sample, and has a relatively good material removal amount.

    In short, for grinding metallographic samples of some materials, metallographic sandpaper should be carefully selected! There are so many metallographic consumables, I only choose the right one.