3
4
3
copper alloy etc.), meantime it may also be used to determine the
hardness of hard alloy, carburized layer and chemically treated
layer. When purchasing, in case the necessary accessory such as
surveying microscope is not bought simultaneously, you may also
carry out the Brinell, Vickers hardness tests under the cooperation
of self -furnished surveying microscope.
The model ISH-BRV Brinell, Rockwell & Vickers hardness tester
adopts rotating type load changing mechanism as well as optical
measurement indicating system, and the microscopic survey
installation is mounted on the body of the apparatus. Hence, it is
convenient, sensible and reliable in the loading measuring system,
high precision in the shown value, it is widely adaptable to the
factory workshop, laboratory, university, college and school as well
as scientific research institute.
Table1
Test force (N)
Type of
test
Primary
test
force
Total
test
force
Symbol
of
hardness
value
Indenter
Measuring
installation
Examples of
Measured &
tested materials
588.
4
HRA
hard
alloy,
carbon
carburizing steel
1471 HRC
diamond
cone
indenter
quenched steel,
adjustable
quality
steel, hard cast
iron
Rockwell
hardness
test
98.07
980.
7
HRB
φ1.588
mm
steel ball
indenter
Optical
measurement
indicating
mechanism
Mild steel,
aluminium alloy
copper alloy
forgeable
cast
iron
Brinell
hardness
test
306.5
612.9
1839
HB
φ2.5,
φ5mm
steel ball
indenter
Surveying
microscope
Non-ferrous
metal
cast iron, soft
alloy, plastics
Vickers
hardness
test
294.2
980.7
HV30
diamond
angle
conical
indenter
Surveying
microscope
The superficial
hardness of
metallic alloy
carburized layer,
small type thin
components
1
1. Top cover 2. Veil 3. Rockwell display 4. Microscope 5. The micro-adjusting
knob 6. The indenter 7. The test piece 8. Slider 9. Dust cover 10. Rotating
wheel for lifting and lowering 11. Buffer adjusting hand wheel 12. Light source
adjusting hand wheel 13. Loading and unloading handle 14. Rear cover 15.
Load changing hand wheel 16. The fuse plug 17. The power switch
Parts descriptions:
Installation And Adjustment
Working conditions of the tester:
Under ambient temperature, i.e. between 10-30 ºC;
The relative humidity in test room shall not be over 65%;
In an environment free from vibration;
1
No corrosive medium in surrounding.
