Reasons for errors in Leeb hardness tester measurements

1. Errors caused by special materials
The conversion table stored in the hardness tester may produce deviations for the following steel types: All austenitic steels, heat-resistant tool steels and ledeburitic chromium steels (tool steels). Hard materials cause an increase in the elastic modulus, thereby increasing L The value is low. This type of steel should be tested on the cross section. Local cooling and hardening will cause the L value to be high. Magnetic steel will have a low L value due to the influence of the magnetic field.
2. Errors in gear detection
In general, due to the small tooth surface, the test error is relatively large. For this, the user can design corresponding tooling according to the situation, which will help reduce the error.
3. Influence of material elasticity and plasticity
In addition to being related to hardness and strength, the Leeb value is also related to the elastic modulus. The hardness value is a characteristic parameter of the material's hardness and plasticity, because the components of the two must be measured together. In the elastic part, it is first obviously affected by the E modulus. In this regard, when the static hardness of the materials is the same but the E value is different, the material with a low E value will have a larger L value.