Automatic Focus Digital Vickers Hardness Tester with Tablet and Vickers Software

Automatic Focus Digital Vickers Hardness Tester with
Tablet and Vickers Software

Brief Introduction:

Automatic Vickers hardness tester adopts the integrated design of hardness tester and panel computer; With Windows 7 operating system, it has all functions of computer.

With CCD image acquisition system, it can show the indentation image directly on the touch screen and automatically get the Vickers hardness value.

It takes over the old method of measuring the diagonal length by eyepiece, avoids the stimulation and visual fatigue of the light source of the eyepiece, and protects the eyesight of the operator.

Main Features:

1, All the testing parameters can be set on the side panel computer.

2, Touch screen makes operation quickly and convenient.

3, CCD image acquisition system can show the image clearly and gets the hardness value just by touching the screen.

4, Automatic recognition and switch between the objective and the indenter, automatically get the Vickers hardness value.

5, Support hardness conversion function.

6, With USB, VGA and LAN interfaces, the hardness measurement can be print out by USB interface.

7, It can automatically save the measuring data, generate the hardness-depth curve and save as WORD or EXCEL document.

8, With motorized X-Y test table, automatic focusing and automatic measuring to realize the fully automation of Vickers hardness testing.

Application range:

Suitable for ferrous metal, non-ferrous metals, IC thin sections, coatings, ply-metals; glass, ceramics, agate, precious stones, thin plastic sections etc.; hardness testing such as that on the depth and the trapezium of the carbonized layers and quench hardened layers.

Technical Specifications:

Packing List:

Principle of Vickers Test

The Vickers hardness test method consists of indenting the test material with a diamond indenter, in the form of a right pyramid with a square base and an angle of 136 degrees between opposite faces subjected to a load of 1 to 100 kgf. The full load is normally applied for 10 to 15 seconds.

The two diagonals of the indentation left in the surface of the material after removal of the load are measured using a microscope and their average calculated. The area of the sloping surface of the indentation is calculated. The Vickers hardness is the quotient obtained by dividing the kgf load by the square mm area of indentation.

When the mean diagonal of the indentation has been determined the Vickers hardness may be calculated from the formula, but is more convenient to use conversion tables.

The Vickers hardness should be reported like 800 HV/10, which means a Vickers hardness of 800, was obtained using a 10kgf force. Several different loading settings give practically identical hardness numbers on uniform material, which is much better than the arbitrary changing of scale with the other hardness testing methods.

The advantages of the Vickers hardness test are that extremely accurate readings can be taken, and just one type of indenter is used for all types of metals and surface treatments. Although thoroughly adaptable and very precise for testing the softest and hardest of materials, under varying loads, the Vickers machine is a floor standing unit that is more expensive than the Brinell or Rockwell machines.

The Knoop hardness test method is mostly used for small parts, thin sections, or case depth work. Knoop indentation is very small, the main application like below:

testing very thin materials like foils or measuring the surface of a part,
small parts or small areas,
measuring individual microstructures,
measuring the depth of case hardening by sectioning a part and making a series of indentations to describe a profile of the change in hardness.

The Knoop indenter is a pyramid shaped diamond is more elongated or rectangular in shape. The Knoop method is commonly used when indentations are closely spaced or very near the edge of the sample.

The width of the Knoop indentation can provide more resolution for measurement and the indentation is also less deep. Consequently, it can be used on very thin materials.