Micro-Hardness Tester

Brief Description

The operation of the instrument is based on indenting a diamond indentor (square based pyramid with an angle of 1360) on the specimen surface under test with a certain load in gm and measuring linear value (d) of the diagonal of the indentor print obtained.

The hardness number (H) is calculated by dividing the load (P in Kg) by the surface area (S in sq mm) of the indentor print and is expressed as H= P/S or 1.854 P/d2.

Salient Features

Opto-mechanical instrument

• Can be used for measuring microscopic hardness in micro Vickers.
  
• The instrument comprises of a microscope with a Filar micrometer piece mounted on a stand,
  
• Loading and unloading mechanism attached to the microscope for taking an indentation of a diamond indentor on a specimen surface under certain load in gms and
  
• Illumination system mounted on the microscope and a rotating table having X and Y movements.
  

Applications

The system would be used for measuring microscopic hardness in micro vickers of metals / alloys, various phases I micro-constituents present in metal matrix, thin wires, sheets, diffusion coatings and case depth of carburised / nitrided components etc.

Contact:

Central Scientific Instruments Organisation,
Chandigarh
Website: http://www.csio.res.in/