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I. Necessity of Hardness Testing
The detection and evaluation of material strength are fundamental requirements for on-site testing of structural buildings. The conventional method for testing the strength of existing steel structures involves on-site sampling for tensile strength testing and chemical analysis. However, this method is time-consuming, labor-intensive, and causes significant damage to the structures. It is also impractical for structures with missing drawings, as large-scale sampling is not feasible. Therefore, in recent years, non-destructive testing techniques, such as hardness testing, have been widely used.
Hardness is one of the most commonly used indicators for evaluating the mechanical properties of metal materials. Hardness essentially represents the material's resistance to being penetrated by a harder material. For the tested material, hardness represents a comprehensive performance of various physical quantities, including elasticity, plasticity, strength, toughness, and wear resistance, under certain indenter and test force conditions. Hardness testing can reflect the differences in metal materials under various conditions, such as different chemical compositions, microstructures, and heat treatment processes. Therefore, hardness testing is widely applied in the inspection of metal properties, quality control of heat treatment processes, and development of new materials.
II. Measurement Results
Statistical analysis of the data obtained by using Digital Universal Hardness Tester to measure the hardness of steel workpiece specimens.
|Hardness values (HRC) measured 5 times using Digital Universal Hardness Tester
Note: The values in red font indicate the maximum and minimum values obtained from 5 measurements of the same specimen.
III. Measurement Image
IV. Test Conclusions
1. Average Value: The average hardness value of the steel workpiece is 61.82 HRC, indicating that it belongs to wear-resistant material. This value represents the average level of hardness obtained from multiple measurements of the steel workpiece, reflecting the overall hardness characteristics of the workpiece.
2. Stability: The repeatability of the measurements is 0.6 HRC. This relatively low value indicates that the differences between the measurement results are small, and it also suggests that the measurement instrument has good stability. A good repeatability implies consistent results under the same conditions when performing multiple measurements.
V. Applicability of Digital Digital Universal Hardness Tester
It is suitable for cases where the number of workpieces to be measured is small and measurements need to be performed using Brinell, Rockwell, and Vickers hardness scales. It is also suitable for situations where different levels of indentation acceptance are required.
▲ Comparison of indentations
▲ Surface indentation on the workpiece after this test
VI. Application Range of Digital Universal Hardness Tester
It is widely used in various materials, including hard alloys, carburized steels, quenched steels, surface quenched steels, hardened cast steels, aluminum alloys, copper alloys, forgings, mild steels, quenched and tempered steels, annealed steels, bearing steels, and more.
VII. Features of Digital Universal Hardness Tester
1. Digital Universal Hardness Tester combines Brinell, Rockwell, and Vickers test methods, offering a seven-level test force multi-functional hardness tester that can meet various hardness testing needs. It features automatic switching for loading, holding, and unloading test force, ensuring simple and fast operation, as well as a storage function.
2. Digital Universal Hardness Tester adopts a rotating test force conversion structure and an optical measurement system. The tester is equipped with a microscope and driven by a low-speed synchronous motor.
3. Digital Universal Hardness Tester comes with a built-in miniature printer and can be optionally equipped with a Bluetooth wireless printer for data printing.
4. Digital Universal Hardness Tester allows for conversion between the hardness values obtained from different scales.
▲ Click the image above to view product details（The display screen is an outdated version of the system）
For more information about hardness testers, please contact us. We are committed to providing technical support and excellent after-sales service.
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