Leeb rebound hardness test

The Leeb rebound technique or rebound hardness testing according to Leeb is a dynamic Härteprüfmethode, which was developed by the scientist Dietmar Leeb.

Here, a striking body, at the front end of a hard metal probe is driven with a defined energy against the surface of the specimen. The impact of the impactor causes a deformation of the surface, resulting in a loss of kinetic energy. This energy loss is determined by velocity measurement and calculates a hardness value HL.

Defined the energy of the impact can be caused by a spring force or a drop tube means. The velocity of the impactor is measured for example by means of an induced on a stationary coil voltage signal. Converted values ​​of Prüfresultats can in values ​​of other hardness scales such as Rockwell (HRC, HRB), Brinell (HB ), Vickers ( HV) and Shore hardness (H ), be converted.

Norms and Standards

From the DIN standardization committee hardness testing of metals are the Leeb hardness method, the calibration of Leeb hardness testing and calibration of Leeb hardness comparison plates as DIN 50156-1, -2 and -3 have been worked out. Internationally, the measuring principle used is standardized as ASTM A956.