How should one choose a hardness tester?

As far as hardness testers are concerned, the key point lies in the precision issue during hardness testing. Generally speaking, hardness testing can utilize a Vickers hardness tester, or a Rockwell or superficial Rockwell hardness tester. This depends on the situation; if very high precision is required, a Vickers hardness tester must be selected. The choice of test force (scale) is related to the effective hardened layer depth and the surface hardness of the workpiece.
The Vickers hardness tester is an important means of testing the surface hardness of heat-treated workpieces. It can select a test force of 0.5 ~ 100kg and test surface hardened layers as thin as 0.05mm. Its precision is very high, and it can distinguish minor differences in the surface hardness of workpieces. In addition, the effective hardened layer depth must also be detected by a Vickers hardness tester. Therefore, for units performing surface heat treatment processing or extensively using surface heat-treated workpieces, it is necessary to be equipped with a Vickers hardness tester.

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