Description:
1. Hardness is one of the
important indices of material mechanical performance. And hardness test is the
important means to determine metal material or the quality of product parts.
Because of the corresponding relation between metal hardness and other
mechanical performance, therefore, most metal materials can be measured the
hardness to approximately calculate the other mechanical performance, such as
strength, fatigue, creep and wear. Brinell hardness test can satisfy the
determination of all the metal material hardness by using different test forces
or changing different ball indenters.
2. The instrument adopts
precise structure design with three indenter and two objectives and the load of
test force is controlled by the sensor. It makes the whole structure compact
and loading of test force stable and exact. The test process is controlled by
CPU, using automatic switching between the objective and the indenter. The
location of switching adopts mechanical and electronic double matching, makes
the location precision more high. Select the scale to start, the instrument
will choose the corresponding indenter and objective to realize the automatic
measurement.
3. The instrument can apply to
the measurement of cast iron, nonferrous metal and alloy material, various
annealing, hardening and tempering steel, especially the soft metal such as
aluminum, lead, tin etc. which makes the hardness value more correct. The main
function is as follows:
This instrument has 10
level of test force, 13 Brinell hardness test scales, free to choose;
With 1╳and 2╳two
objectives, both can beinvolved in the measurement of indentation length;
With three indenters
for automatic measurement;
Automatic switching
between the objective and the indenter;
Can preset the test
force dwell time and adjust intensity of light source;
Can show the
indentation length, the hardness value and the number of measurements etc.;
Choice of conversion
between each scale of hardness values;
The test result can be
printed;
According to the
particular requirements of the client, it can be equipped with CCD indentation
automatic measuring device or video measuring device.
Technical Specifications:
1. Test force:
Totally 10 level of test force:
|
612.9N（62.5kg）
|
4903N（500kg）
|
|
980.7N（100kg）
|
7355N（750kg）
|
|
1226N（125kg）
|
9807N（1000kg）
|
|
1839N（187.5kg）
|
14710N（1500kg）
|
|
2452N（250kg）
|
29420N（3000kg）
|
Test force control: closed
loop system
Test force applying: automatic
(loading / dwell/ unloading)
Applying time of test force:
2~8s
Dwell time: 0~60s (5 seconds
as an unit)
2. Specification of the indenter
φ2.5mmball indenter,
φ5mmball indenter, φ10mmball indenter
3. Brinell hardness test scale
Totally 13 test scales
|
Diameter of Indenter
|
Brinell Hardness Scale
|
|
10mm
|
HBW 10/3000
|
HBW 10/1500
|
HBW 10/1000
|
HBW 10/500
|
|
HBW 10/250
|
HBW 10/125
|
HBW 10/100
|
|
|
5mm
|
HBW 5/750
|
HBW 5/250
|
HBW 5/125
|
HBW5/62.5
|
|
2.5mm
|
HBW 2.5/187.5
|
HBW2.5/62.5
|
|
|
4. Repetition and tolerance of
displayed value for the hardness tester
|
Standard hardness test block (HBW)
|
Tolerance of displayed value%
|
Repetition of displayed value%
|
|
≤125
|
±3
|
3
|
|
125＜HBW≤125
|
±2.5
|
2.5
|
|
＞225
|
±2
|
2
|
5. Optical system
|
Eyepiece
|
Objective
|
Total Amplifications
|
Resolution
|
|
20╳
|
1╳
|
20╳
|
1.25μm
|
|
2╳
|
40╳
|
0.625μm
|
6. Test force carried: Automatic
(loading/dwell/unloading)
7. Shifting between the indenter and
objective: Automatic
8. Hardness reading: Measure the
length of indentation, press the button to input, it automatically calculate
and show the hardness value.
9. Scale conversion: Choice of
conversion between each scale of hardness values.
10. Appearance parameters:
Overall dimensions (H×D×W):
(890×535×260) mm
Maximum height of specimen
allowed:260 mm
Distance between the point of
the indenter and the exterior panel:150 mm
Weight:150 kg
Power and voltage: AC
220V/110V±5%，50~60 Hz
