Vickers hardness test is mainly used in material research and scientific testing of small load Vickers hardness test, mainly used to test the hardness of small precision parts, the hardness of the surface hardened layer and the depth of the effective hardened layer, the surface hardness of the coating, the hardness of the sheet material and the hardness of the fine wire, the hardness near the blade, the hardness of the dental material, etc. Since the test force is small and the indentation is small, the appearance and performance of the sample can not be affected. Application: Heat treatment, carbonization, hardening layer, surface coating, steel, non-ferrous metal and small and thin parts.