Mitech MHVS-1Z automatic turret digital micro hardness tester, based on the principle that positive quadrangular pyramid diamond indenter presses the surface of the sample to produce indentation.By measuring the diagonal length of the indentation to achieve the measurement of the hardness of the material can be for small specimens, thin specimens, surface coating, heat treatment of the workpiece surface Vickers hardness test. With digital display, stable measured value, automatic turret system, high magnification optical measurement system, photoelectric sensor and other high-tech, through computer-aided software, it can achieve a number of functions such as adjustable light source and it is the upgraded products of universal micro hardness tester. It is widely used in the fields of metal processing, electronics industry, mold parts, watch manufacturing, engineering quality inspection and so on. It is an ideal hardness tester for material research and testing.
Metal processing manufacturing quality control links
University education teaching demonstration experiment
Failure analysis test of metal material
Testing of material hardness of scientific research institutions
Quality inspection departments quality testing links
Micro-Vickers (or Knoop) hardness test principle is that put the provisions of the positive pyramid diamond indenter into the sample surface(with fixed experimental force) and maintain a certain length (holding), and then unloading. Finally, there is a positive quadrangular pyramid or kenup indentation with a square surface on the surface of the specimen. Then we can attain the area of indentation via measuring the length of the diagonal by a micrometer eyepiece. Then the corresponding Vickers (or Knoop) hardness values are obtained.
Usually Vickers hardness values can be converted according to the following formula
HV=constant×test force / indentation surface area≈0.1891 F/d2
Note:
HV, Vickers hardness symbols
F, test force
d, the arithmetic mean of of the two diagonal d1, d2
Operation Temperature:18~28℃;
Relative Humidity:≤65%;
In an environment free from vibration,no corrosive medium in surrounding.
Installed on a flat basis.
Test force | 10gf (0.098N), 25gf (0.245N), 50gf (0.49N), 100gf (0.98N), 200gf (1.96N), 300gf (2.94N), 500gf (4.9N |
Measuring range | 5~2500HV |
Conversion scale | HRA、HRB、HRC、HRD、HR15N、HR30N、HR45N、 HR15T、HR30T、HR45T、HV、HK、HBW |
Applying way of test force | Automatic (loading, holding, unloading) |
Conversion way of indenter | Automatic |
Magnification of measure microscope | 100X(observing )400X(measuring) |
Test force holding time | 0~60s |
Minimum resolution | 0.01μm |
Maximum height of specimen | 75mm |
Maximum distance of indenter to fuselage center | 95mm |
Display attributes | LED Digital Display |
Minimum index of the micrometer drum | 0.0625μm |
Power supply | AC220V±5%, 50~60Hz |
Dimension | 441*270*480mm |
Main unit weight | 31kg |
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