Ada 7 jenis probe untuk bekerja dengan Leeb hardness tester untuk aplikasi yang berbeda, yaitu D / DC / D+15 / C / G / E /DL.
- Perangkat Dampak Universal D – Untuk sebagian besar persyaratan pengujian kekerasan.
- DC – Digunakan di ruang yang sangat terbatas, mis. dalam lubang, silinder atau untuk pengukuran internal pada mesin rakitan.
- DL – Untuk pengukuran di ruang yang sangat terbatas atau di dasar alur.
- D+15 – Untuk pengukuran di alur atau permukaan yang tersembunyi.
- C – Komponen yang diperkeras permukaan, pelapis, komponen berdinding tipis atau komponen sensitif benturan (lekukan berukuran kecil).
- G – Komponen berat atau kasar padat. misalnya coran dan tempa berat.
- E – Untuk material super keras.
Measuring range of hardness tester probes
| Material Hardness | Hardness scale | Impact device | |||||
| D/DC | D+15 | C | G | E (imported) | DL | ||
| Steel and cast steel | HRC | 17.9～68.5 | 19.3～67.9 | 20.0～69.5 | 22.4～70.7 | 20.6～68.2 | |
| HRB | 59.6～99.6 | 47.7～99.9 | 37.0～99.9 | ||||
| HRA | 59.1～85.8 | 61.7～88.0 | |||||
| HB | 127～651 | 80～638 | 80～683 | 90～646 | 83～663 | 81～646 | |
| HV | 83～976 | 80～937 | 80～996 | 84～1042 | 80～950 | ||
| HS | 32.2～99.5 | 33.3～99.3 | 31.8～102.1 | 35.8～102.6 | 30.6～96.8 | ||
| Steel | HB | 143～650 | |||||
| CWT. steel | HRC | 20.4～67.1 | 19.8～68.2 | 20.7～68.2 | 22.6～70.2 | ||
| HV | 80～898 | 80～935 | 100～941 | 82～1009 | |||
| Stainless steel | HRB | 46.5～101.7 | |||||
| HB | 85～655 | ||||||
| HV | 85～802 | ||||||
| GC. iron | HRC | ||||||
| HB | 93～334 | 92～326 | |||||
| HV | |||||||
| NC. iron | HRC | ||||||
| HB | 131～387 | 127～364 | |||||
| HV | |||||||
| C. Alum | HB | 19～164 | 23～210 | 32～168 | |||
| HRB | 23.8～84.6 | 22.7～85.0 | 23.8～85.5 | ||||
| Brass | HB | 40～173 | |||||
| HRB | 13.5～95.3 | ||||||
| Bronze | HB | 60～290 | |||||
| Copper | HB | 45～315 | |||||
Tolerance and repeatability
| No. | impact device | Hardness value of Leeb standard hardness block | Accuracy of displayed value | Repeatability of displayed value |
| 1 | D | 790±40HLD 530±40HLD | ±6 HLD ±10 HLD | 6 HLD 10 HLD |
| 2 | DC | 790±30HLDC 530±40HLDC | ±6 HLDC ±10 HLDC | 6 HLDC 10 HLDC |
| 3 | DL | 894±40HLDL 736±40HLDL | ±12 HLDL | 12 HLDL |
| 4 | D+15 | 795±40HLD+15 544±40HLD+15 | ±12 HLD+15 | 12 HLD+15 |
| 5 | G | 590±40HLG 500±40HLG | ±12 HLG | 12 HLG |
| 6 | E | 755±40HLE 508±40HLE | ±12 HLE | 12 HLE |
| 7 | C | 851±40HLC 590±40HLC | ±12 HLC | 12 HLC |
Technical specifications of impact devices
| Types of impact device | DC(D)/DL | D+15 | C | G | E(imported) |
| Impact 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 Diameter of test tip Material of test tip |
1600HV 3mm Tungsten carbide |
1600HV 3mm Tungsten carbide |
1600HV 3mm Tungsten carbide |
1600HV 5mm Tungsten carbide |
5000HV 3mm 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 |
| Roughness of sample surface | 1.6μm | 1.6μm | 0.4μm | 6.3μm | 1.6μm |
| Minimum weight of sample: Measure directly Need support firmly Need coupling tightly |
>5kg 2~5kg 0.05~2kg |
>5kg 2~5kg 0.05~2kg |
>1.5kg 0.5~1.5kg 0.02~0.5kg |
>15kg 5~15kg 0.5~5kg |
>5kg 2~5kg 0.05~2kg |
| Min. thickness of sample Coupling tightly Min. depth of layer thickness for surface |
5mm ≥0.8mm |
5mm ≥0.8mm |
1mm ≥0.2mm |
10mm ≥1.2mm |
5mm ≥0.8mm |
Size of tip indentation
| Hardness 300HV |
Indentation diameter | 0.54mm | 0.54mm | 0.38mm | 1.03mm | 0.54mm |
| Depth of indentation | 24μm | 24μm | 12μm | 53μm | 24μm | |
| Hardness 600HV |
Indentation diameter | 0.54mm | 0.54mm | 0.32mm | 0.90mm | 0.54mm |
| Depth of indentation | 17μm | 17μm | 8μm | 41μm | 17μm | |
| Hardness 800HV |
Indentation diameter | 0.35mm | 0.35mm | 0.35mm | 0.35mm | |
| Depth of indentation | 10μm | 10μm | 7μm | 10μm | ||
| D: General test. DC : Testing hole or inner of cylinder. DL : Test slender 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 cast steel. |
E : Test super high hardness Material. |
Ulasan
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