Digital Micro Hardness Tester MHVS-1

Mitech MHVS-1digital 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. Adopted computer-aided, high-rate optical measurement system, photoelectric sensor technology, adjustable light, it is the upgrading products of universal type of micro hardness tester and 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. 

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

×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.

Instrument Features