• summary:

The plastic ball indentation hardness tester refers to a device that measures the average pressure per unit indentation area of a steel ball of a specified diameter, which is vertically pressed onto the surface of a specimen under test load and held for a certain period of time.

The TQY series ball indentation hardness tester developed by our company adopts automatic loading, timing selection, deformation acquisition and other methods, and replaces the commonly used digital block display method with LCD Chinese character display. In this way, the operator can perform experimental operations based on the Chinese character prompts on the LCD screen after turning on, which greatly facilitates the user. All parameters of the instrument comply with the provisions of relevant standards such as GB3398 and ISO2039-1:2001.

※ Can store data and have traceability; ※ Touch screen operation ※Voice prompt

• working principle:

According to the relevant requirements of the standard, in a mechanism composed of a frame, loading device, indentation depth indicator device, timing device, and indenter (embedded with steel balls of specified diameter), the loading device vertically presses the indenter into the surface of the specimen under a given test load, and maintains the average pressure per unit indentation area for a certain period of time. In kgf/mm²Or N/mm²express.

The hardness value of the ball indentation is calculated according to the following formula:

0．21P

H=

0.25πD（h-0.04）

In the formula: H - ball indentation hardness, kgf/mm²Or N/mm²

P——Test load, kgf or N

D——Steel ball diameter, mm

h——The indentation depth after correcting the deformation of the rack, mm

Note: h=h₁-h₂;

h₁- Depth of indentation under test load, mm

h₂- The deformation of the instrument rack under test load, mm

3、 Main technical parameters:

1. Initial load: 9.8N
2. Test load:49N、 132N、358N、612N、961N
3. Load accuracy: ± 1%
4. Pressure head diameter: Ø 5mm ± 0.5%, Ø 10mm ± 0.5%
5. Hardness of indenter: 800Hv
6. Sample height: 4mm
7. Indentation depth indication minimum division value: 0.001mm
8. Depth measurement accuracy: ± 1%
9. Timing range: 10~90S
10. Timing accuracy: ± 0.5%
11. Host deformation: ≤ 0.04mm
12. Coaxiality between the lifting worktable and the spindle axis: ≤ 0.02mm
13. Effective range of indentation depth: 0.15-0.35mm
14. Sample size: 50 × 50 × 4 or Φ 50 × 4
15. Indentation position: The distance between the indentation position and the edge of the specimen should not be less than 10mm, and the distance between two indentations should not be less than 10mm

3、 Standard configuration:

4、 Software image example