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Product OverviewMITECH MU220 non-destructive ultrasonic hardness tester, based on the principle of ultrasonic contact impedance method (UCI method), can quickly and without damage to detect the hardness of a variety of metal materials including composite materials and new materials, and has no pressure on the surface of the tested workpiece. It has high measurement accuracy and both single-point and multi-point calibration modes. It adopts 3.5-inch LCD color display, intuitive and comprehensive data display, supports mutual conversion among various hardness systems. It is the ideal instrument for detectingvarieties of materials.Function & applicationHardness test of flange edge and gear root stamping parts, mold, thin plate, face-hardened gear tooth, gear groove and taper part;Hardness test of axle and thin-wall pipes and vessels;Hardness test of wheels and turbine rotors;Hardness test of bit edge;Hardness test of welding parts;Measure the depth of deep hole with certain aperture, concave and convex mark with large radians, and irregular plane;Hardness test of most ferrous and nonferrous metals and their alloys in industrial production.Working PrincipleIn order to solve the problems of workbench Vickers hardness tester (Long test time; Bulky and heavy; Not suitable for test on site and test large workpiece; Huge technical demand for the operators), in 1961, Ultrasonic Contact Impedance, a hardness testing method was developed by Dr.Claus Kleesattel, and the hardness tester designed by UCI method is called Ultrasonic Hardness Tester.UCI method uses a spring to generate the test force required for Vickers hardness test, test force is applied to the user's workpiece by means of a resonating rod which is inlaid with a 136odiamond regular pyramid indenter, the diamond indenter forms a Vickers diamond indentation on the workpiece. The diagonal length of the indentation corresponds to Vickers hardness, and the diagonal length also corresponds to the frequency change of the resonating rod, so the hardness of the workpiece can be known from the frequency change of the resonating rod.Note: Because of the use of standard Vickers indenter and test force, ultrasonic hardness tester can test Vickers hardness of workpiece directly. So, ultrasonic hardness tester is a kind of Vickers hardness tester.Working ConditionsOperating temperature:-20 ℃ ~ 50 ℃;
Working humidity: ≤ 85%.
Instrument FeaturesBased on the principle of ultrasonic resonance, the surface of the tested workpiece is minimally damaged. It is suitable for measuring finished workpieces with high surface technology requirements;The measurement speed is fast, and the test results can be output within 1 second; the built-in hardness system conversion function can be converted between the three hardness systems of Brinell (HB), Rockwell (HRC) and Vickers (HV);Adopt 3.5-inch LCD color display, the main interface of the screen directly displays the current measurement value, the cumulative measurement times, maximum value, minimum value, average value, automatic storage of measurement data, measurement time, material, hardness conversion table standard, intuitive and comprehensive display;
With a single-point calibration mode, one-point calibration is used for materials with different elastic moduli to eliminate the influence of elastic modulus and improve measurement accuracy;
With multi-point calibration mode, it can directly adjust HRC, HRB, HRA, HB, HV, especially suitable for composite materials or new materials without hardness value conversion comparison table, which can be directly calibrated for HRC, HRB, HRA, HB, HV;
The 10-point factory calibration mode, through the calibration of 10 Vickers hardness blocks with different hardness values, to ensure the factory accuracy of the instrument;
Optional Bluetooth printer can print measurement data;
Detecting workpieces of different materials only needs to use test blocks of the same or similar material for adjustment without changing the probe;
Comply with DIN 50159-1-2008, ASTM-A1038-2005, JB/T 9377-2010, JJG-654-2013, GB\T34205-2017 hardness testing standards.
Operating Method and AttentionsInstrument Maintenance -
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Minimum workpiece thickness 2mm Minimum workpiece weight 0.3kg Range HV50-1599, HRC20-76, HB76-618, HRB41-100, HRB41-100, HRA61-85.6, Mpa255-2180 Test Error HRC: ± 2HRC; HB: ± 3%HB; HV: ± 3%HV Probe test force 2kgf(optional 0.5kgf, 1kgf, 5kgf, 10kgf) Working temperature -20℃~50℃ -
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