If you want to have testing done on metal, then you will need to have a sample that you can test yourself or that you can send to a lab for testing. There are a few steps involved in preparing samples, including the grinding process. Grinding is a step that should not be skipped when you're preparing your samples, but there are certain things that you will need to keep in mind when doing so. For example, these are some of the things that you will want to know about grinding metallographic samples and metallographic sample preparation.
You Should Make Sure You Have the Right Sample
If you are ready to get started, you should look over your sample to make sure that it's a good-quality one that is ready for grinding. This will help you ensure that you have the most success when grinding the sample, and it will also help you be sure that the sample is right for testing. For example, you should make sure that the metallographic sample is free of scratches and stains. It should not have inclusions and should not be disturbed by even small traces of other metals.
Coarse Grinding Should Be Done First
Once you have made sure that your metallographic sample is a good candidate for grinding and taking other sample preparation steps, you should know that coarse grinding will need to be done first. There are grinders that can be used for this purpose, and you'll probably want to use a grinder instead of a sander or some other type of equipment so you can be sure that the job is done right and make things easier for yourself. A coarser grit will need to be used on the grinder. The majority of grinding that is done on your metallographic sample will probably be done with a coarse grinder.
Fine Grinding Should Then Be Done
After coarse grinding is done, then fine grinding is the next step that has to be taken. Fine grinding might first be done with a grinding machine. However, final grinding might actually be done by hand with the appropriate fine-grit sandpaper.
It's Important to Be Sure the Sample Doesn't Get Too Hot
One thing that you have to be worried about when working with grinding equipment on any surface is heat. If your metallographic sample gets too hot during the grinding stage, then it could be compromised. Working slowly, taking frequent breaks in the grinding process, and washing the sample with cool water in-between grinding jobs or when the surface temperature seems to be getting too high are all things you can do if you want to prevent your sample from getting too hot.