How can you distinguish between a microhardness tester and a Vickers hardness tester based on the sample being measured?

Taiwan Nakazawa answers for you that micro-hardness testers are more suitable for measuring the hardness of heat-treated layers of metal parts, carburized layer hardness, nitrided layer hardness, surface coatings, thin metal sheets such as copper strips, stainless steel strips, copper foil, aluminum foil, steel wire, and other micro parts. Of course, they can also measure specimens of a certain thickness. Because the test force of a Vickers hardness tester is relatively larger than that of a micro-hardness tester, it is not suitable for measuring the aforementioned coatings or surface hardness. It is more suitable for measuring the overall hardness of parts. This is because if a Vickers hardness tester is used to test thin or infiltrated layer hardness, it will penetrate the surface layer and strike the base material directly, making it impossible to accurately measure the actual hardness value of the surface or infiltrated layer.