Hardness testing in the laboratory
Mithilfe von Härteprüfung können Sie Materialeigenschaften, wie Festigkeit, Zähigkeit und Verschleißfestigkeit, beurteilen und so besser entscheiden, ob ein bestimmter Werkstoff oder eine bestimmte Werkstoffbehandlung für Ihre Zwecke geeignet ist.
Die Härteprüfung ist definiert als „eine Prüfung zum Bestimmen des Widerstands, den ein Werkstoff der dauerhaften Verformung durch Aussicht eines härteren Eindringkörpers entgegensetzt“. Die Prüflabore des TÜV NORD sind mit einer breiten Palette von Härteprüfgeräten ausgestattet, die die Prüfung von metallischen Werkstoffen und Polymerwerkstoffen nach unterschiedlichen Verfahren ermöglicht.
Hardness testing can help you evaluate material properties, such as strength, toughness, and wear resistance, to better determine whether a particular material or material treatment is suitable for your purposes.
Hardness testing is defined as "a test to determine the resistance a material offers to permanent deformation by the prospect of a harder indenter." TÜV NORD's testing laboratories are equipped with a wide range of hardness testing equipment, which enables the testing of metallic materials and polymer materials according to different methods.
Hardness testing according to Rockwell, Vickers and Brinell
In hardness testing, the harder body (Vickers + Rockwell = synthetic diamond / ball | Brinell = tungsten carbide ball | Knoop = diamond rhombus) compresses the material to the maximum under the application of a defined test load. In dynamic hardness tests, the load is applied to the test specimen abruptly; in static tests, the load is applied constantly. The Brinell hardness test is suitable for soft to medium-hard metals where the surface must be ground flat. The Vickers hardness test is suitable for thin sheets and layers and can therefore also be used in the macro and micro range, and the Rockwell hardness test, on the other hand, is suitable for larger and hard specimens.
Hardness testing methods - measurements and control
In addition to classical and ambulatory hardness testing, TÜV NORD also offers hardness testing according to Shore A and D and Barcol for polymer materials. We can use various devices (according to the Vickers method and the UCI method) for hardness testing on components or directly on site at the plant.
Hardness testing can be used to verify specified hardness values and evaluate welds for hardness progression. These values can provide indications of material mix-ups, heat treatments or changes in strength properties.
Occasions for measurements include checking the specified hardness values, confusion testing, testing the heat treatment condition, testing for changes in properties, for example in the case of fire damage.
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Please feel free to contact us at the respective locations.