Description

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.

 

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