Products
The Impact Device of Hardness Tester
2.1.4 Different Types of Impact Device
| Type of impact device | DC(D)/DL | D+15 | C | G | E | |
| Impacting energy Mass of impact body |
11mJ 5.5g/7.2g |
11mJ 7.8g |
2.7mJ 3.0g |
90mJ 20.0g |
11mJ 5.5g |
|
| Test tip hardness: Dia. Test tip: Material of test tip: |
1600HV 3mm Tungsten carbide |
1600HV 3mm Tungsten carbide |
1600HV 3mm Tungsten carbide |
1600HV 5mm Tungsten carbide |
5000HV 3mm synthetic diamond |
|
| Impact device diameter: Impact device length: Impact device weight: |
20mm 86(147)/ 75mm 50g |
20mm 162mm 80g |
20mm 141mm 75g |
30mm 254mm 250g |
20mm 155mm 80g |
|
| Max. hardness of sample | 940HV | 940HV | 1000HV | 650HB | 1200HV | |
| Mean roughness value of sample surface Ra: | 1.6μm | 1.6μm | 0.4μm | 6.3μm | 1.6μm | |
| Min. weight of sample: Measure directly Need support firmly Need coupling tightly |
>5kg |
>5kg |
>1.5kg |
>15kg |
>5kg |
|
| Min. thickness of sample Coupling tightly Min. layer thickness for surface hardening |
5mm ≥0.8mm |
5mm ≥0.8mm |
1mm ≥0.2mm |
10mm ≥1.2mm |
5mm ≥0.8mm |
|
| Size of tip indentation | ||||||
| Hardness 300HV | Indentation diameter Depth of indentation |
0.54mm
24μm |
0.54mm
24μm |
0.38mm
12μm |
1.03mm
53μm |
0.54mm
24μm |
| Hardness 600HV | Indentation diameter Depth of indentation |
0.54mm
17μm |
0.54mm
17μm |
0.32mm
8μm |
0.90mm
41μm |
0.54mm
17μm |
| Hardness 800HV | Indentation diameter Depth of indentation |
0.35mm
10μm |
0.35mm
10μm |
0.35mm
7μm |
—
— |
0.35mm
10μm |
| Available type of impact device | DC: Test hole or hollow cylindrical; DL:Testslender narrow groove or hole | D+15: Test groove or reentrant surface | C: Test small,light,thin parts and surface of hardened layer | G: Test large, thick,heavy and rough surface steel | E: Test super high hardness material | |
| Type of Impact Device | Distance of center of the two indentations | Distance of center of the indentation to sample edge |
| Not less than (mm) | Not less than (mm) | |
| D、DC | 3 | 5 |
| DL | 3 | 5 |
| D+15 | 3 | 5 |
| G | 4 | 8 |
| E | 3 | 5 |
| C | 2 | 4 |
