ALPA H-Master LB151AU User manual

ELECTRONIC UNIVERSAL HARDNESS TESTER LB151AU
Lingua originale: Inglese
REV. 1 - 11/19
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DESCRIPTION
1.Panel Shell
2.Dial Gauge
3.Fastening Screw of Indenter
4.Indenter
5.Testing Anvil
6.Up and Down Lead Screw
7.Load-Change Hand Wheel
8.Rotating Wheel
9.Emergency Stop
10.Control Button
11.Back Cover
12.Upper Cover
13.Power Socket
14.Power Switch
15. The Frame
10
1
15
2
5
3
4
6
8
7
12
11
9
13 14
CONTENTS
1. TECHNICAL DATA
2. BRIEF INTRODUCTION
3. INSTALLATION OF HARDNESS TESTER
4. ROCKWELL HARDNESS
5. BRINELL HARDNESS
6. VICKERS HARDNESS
7. MAINTENANCE AND PRECAUTIONS
8. STORAGE AND SHIPPING NOTICE
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1.1 TECHNICAL DATA
Rockwell Scales: HRA, HRB, HRC, HRD, HRE, HRF, HRG, HRH, HRK, HRL, HRM, HRP, HRR,
HRS, HRV
Preliminary Test Force: 10Kgf (98.07N) Permitted Error: ±2.0%
Test Force: 60Kgf (588.4N), 100Kgf (980.7N), 150Kgf (1471N)
Permitted Error:±1.0%
Dwell Time: Adjustable 1-60s
Hardness Indication: 5.2” Touch Screen, Resolution:640x480
Resolution: 0.1HR
Loading Control: Auto Loading/Dwell/Unloading
Hardness Conversion: HRC, HV, HBS, HBW, HK, HRA, HRD, HR15N, HR30N,
HR45N, HS, HRF, HR15T, HR30T, HR45T,HRB
Conversion Standards: ASTM, DIN
Language Option: Chinese, English, German, Portuguese, Turkish, Czech, Korean
Correction Range: -3.0HR to +3.0HR, Step 0.1HR
Data Memory: 2000 Single Measuring Result, Curve Analysis, Results
Reviewing And Analysis
Data Output: Optional Blue Tooth Mini Printer
Max. Height Of Specimen: 175 mm
Instrument Throat: 165 mm
Power supply: AC220V/50Hz; AC110V/60Hz
Dimension (LxWxH): 546 x 182 x 755 mm
Packing Dimension: 620 x 460 x 870 mm
Gross/Net Weight: 120Kg / 90Kg
Execution Standard: GB/T230.2, JJS Z2245, EN-ISO6508, ASTME-18
2. BRIEF INTRODUCTION
• Hardness is one of the important mechanic characteristics of
the material while the hardness testing is an important method
to judge the quality of the metal material or its component
parts. The hardness of the metal is correspondent to its
mechanic characteristics, and so its mechanic characteristics
such as the strength, tiredness, wriggling and wearing out can
be tested out approximately through its hardness testing.
• The Motorized Brinell Rockwell & Vickers Hardness Tester,
a multi-functional hardness tester with Brinell, Rockwell
&Vickers 3 kinds of testing methods and 7 steps testing force
will meet the needs of many kinds of hardness measurement.
The instrument is adopted automatic shifter to load, dwell and
unload testing force, rotate the Load-Change Hand Wheel to
change values of testing force, therefore the operation for this
instrument is simple, easy and quickly. Beside set zero to the
dial, there is no man made error for operation. The present
instrument is with high sensitivity and stability, so as t for
usage in workshop and testing laboratory.
PRECAUTIONS
1. Carefully read the Operation Manual before you use the
hardness tester and get to know thoroughly the operation
procedure and the usage precautions so as to avoid the
damages to the hardness tester and the safety accidents
caused by the improper operation.
2. All the bands and the anti-shock tapes should be carefully
removed before the hardness tester is installed and
calibrated.
3. The single-phase 3-pin socket should be used for the power
source of the hardness tester and the ground connecting
cable should meet the safety requirements.
4. It is strictly prohibited to tamper with the installed position
of all the electric component parts, switches, and sockets
of the hardness tester without permission, otherwise it will
cause accident.
5. It should not to turn the force knob or the Rotating Wheel
during the loading and unloading operations and the dwell
time of the test force.
6. Our company tries to improve the quality of the hardness
testers and renew their structure. In case the contents in
the Operation MANUAL are a bit different with the actual
structure of the instrument, it is hoped and apologized for
the fact that the further notice will not be given.
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3. INSTALLATION OF THE HARDNESS TESTER
3.1 The working condition of the hardness tester
3.1.1 Under the room temperature between 10~30°C;
3.1.2 The relative humidity in the test room shall not be over 65%;
3.1.3 In an environment free from vibration and shock; without
corrosive in surroundings.
3.2 THE UNPACKING OF THE HARDNESS TESTER
3.2.1 Cut the belts on packing box, loosen off the screws at
bottom of packing box, remove the upper body of packing box,
and take out accessories kit.
3.2.2 Unscrew two (2) M10 outer hexagonal bolts under the
bottom plate with a spanner, to separate the hardness tester
from the bottom plate.
3.2.3 After unpacking, the hardness tester shall be placed on a
stable working table horizontally, with horizontal deviation less
than 1mm/m. A hole shall be drilled at an appropriate location
on the working table (see Fig.1) to enable the Up and Down
Lead Screw to operate properly. We suggest the height of
working table should be about 500mm.
3.4 THE INSTALLATION OF THE WEIGHT GROUP (FIG.3)
3.4.1 During installation of weights, the instrument should be in
the state without any test force.
3.4.2 The weights shall be placed on the hanging rod (17) tray
one by one according to the sequence from the bottom to the
top, and the test force shall be rotated to change the handwheel
so that all weights can be reset to the normal position.
3.5 THE CORRESPONDENCE RELATION AMONG
HARDNESS SCALE--TEST FORCE--WEIGHTS IN
WORKING STATUS (TABLE 1).
Fig.1
Fig. 3
Hardness Scale Test Force Graduated Value of Load-Changing Hand Wheel Force on the Weight (Weight Code )
HV, HB 294.2 (30kg) 306.5 7
HB 306.5 (31.25kg) 306.5 7+1
HRA 588.4 (60kg) 588.4 7+1+6
HB 612.9 (62.5kg) 612.9 7+1+6+5
HV,HB,HRB 980.7 (100kg) 980.7 7+1+6+5+4
HRC 1471 (150kg) 1471 7+1+6+5+4+3
HB 1839 (187.5kg) 1839 7+1+6+5+4+3+2
Table 1
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3.6 INSTALLATION OF MEASURING MICROSCOPE
3.6.1 Take out the microscope body of the measuring
microscope from the accessory box, install and x it on the
microscope frame on the left side of the main body.
Align the two locating pins and tighten them with screws.
3.6.2 Install the micrometer eyepiece. Tighten the screws.
3.6.3 Install 4x objective lens (10x objective lens is used for
Vickers indentation measurement) and tighten it.
One or more adjusting washers may be installed between the
objective lens and the connecting pipe, be careful not to remove
them.
3.6.4 在Install the light tube on the objective lens, insert the
power plug of the lamp into the jack on the side of the body and
tighten the back cap.
3.7 ANVIL INSTALLATION
There are two types of 4 anvils for hardness tester. They are:
at anvil and V-shape installed in the middle hole of lifting lead
screw, and at anvil and V-shape anvil installed on the sliding
test bench.
Installation of the middle hole of the lead screw: insert the
handle of the anvil into the hole at the upper end of the lead
screw.
Installation of sliding test stand: rst slightly rotate and lower
the lead screw protective cover. Insert the handle of the sliding
test stand into the hole at the upper end of the lead screw, and
screw the back cap onto the lead screw. Then install the test
bench on the slider of the test bench. Readjust the height of the
protective cover to fully cover the lifting lead screw.
To facilitate the horizontal adjustment of the hardness tester, a
at anvil can be installed in the lead screw hole rst.
3.8 HORIZONTAL ADJUSTMENT
Place the level gauge on the anvil, adjust the position and
posture of the hardness tester, and adjust the levelness of the
hardness tester within 1 / 1000 mm.
3.9 INDENTER INSTALLATION
There are ve indenters in the standard of universal hardness
tester, and the installation method is the same.
Wipe off the rust proof oil stain on the pressure head, insert it
into the installation hole at the lower end of the pressure shaft,
and use the set screw to tighten it.
Fig4 Microscope Body Installation
Fig5 Anvil Installation
4. ROCKWELL HARDNESS
4.1 The Technical Specications of Rockwell Hardness
4.1.1 The Initial Test Force: 98.07N (10Kg)
4.1.2 The Total Test Force : 588.4N (60Kg), 980.7N (100Kg),
1471N(150Kg)
4.1.3 The Indenter: The Diamond Rockwell Indenter, The
ф1.5875 mm Ball Indenter
4.1.4 The Tolerance of Rockwell Hardness Display Value (Table 2)
Hardness Scale Hardness Range of The Standard Testing Blocks The Max. Tolerance of Display Value
HRA 20~≤75HRA ±2HRA
>75~≤88HRA ±1.5HRA
HRB
20~≤45HRB ±4HRB
>45~≤80HRB ±3HRB
>80~≤100HRB ±2HRB
HRC 20~≤70HRC ±1.5HRC
Table 2
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4.3 THE OPERATION PROCEDURE OF THE ROCKWELL
HARDNESS TESTER
4.3.1 Connect the Power Socket (13) with power source,
then turn on The Switch (14), nixie tube of the Touch Panel (10)
will light.
4.3.2 According to hardness grade of the specimen, select
Scale form Table 3. Turn the Load-Change Hand Wheel
clockwise to conrm the total testing force.
4.3.3 Push the indenter (4) into the hole of main spindle
closely against the supporting plane and make the caved
plane of the indenter handle face to the screw. Fasten slightly
the Fastening Screw for the Indenter (3), and then place the
specimen on the Working Table (6).
4.3.4 Turn the Rotating Wheel (7) clockwise, lift the Up
and Down Moving Shaft, enable the specimen slowly touch
the indenter without any shock until the short pointer in dial
indicator of the instrument move from black point to red point,
at this time, the long pointer turn 3 cycles then indicate towards
to position “C” vertically (When testing HRB hardness value,
the long pointer indicate towards to position “B”. When testing
Brinell & Vickers hardness value, it is no necessary to set Zero).
At this point, it has loaded initial Test Force 98.07N (10Kg), the
There are 3 kinds of testing scale for Rockwell Hardness such as A, B & C.
Scale Indenter Initial Test
Force(N)
Total Test
Force(N) Applications
HRA Diamond
Indenter
98.07
(10kg) 588.4 Hard alloy, carbide, surface-quenched steel, carburized steel plate (sheet)
HRD 980.7 Steel sheet, surface-quenched steel
HRC 1471 Quenched steel, tempered steel, Hard cast iron
HRF
Ball Indenter
φ1.5875mm
(1/16 inch)
588.4 Cast iron, aluminum, magnesium alloy, bearing alloy,
annealed copper alloy, mild steel sheet
HRB 980.7 Mild steel, aluminum alloy, copper alloy, malleable cast
iron, annealed steel
HRG 1471 Phosphor bronze, beryllium bronze, malleable cast iron
HRH Ball Indenter
φ3.175mm
(1/8 inch)
588.4 Aluminum, zinc, lead, etc
HRE 980.7 Bearing alloy, tin, hard plastic and other soft materials
HRK 1471
Fig. 3
4.2.1 The surface of the specimen should be smooth and clean
without any feculence, oxidized peels and concaves, on the
outstanding without processing signs.
4.2.2 The Min. thickness of the specimen should be 10 times
superior to the depth of the indentation. After the test, the back of
the specimen should not have any visible signs of deformation.
4.2.3 The specimen should be stably xed on the working
table. There should be no any movement of the specimen
during the testing process and the test force should be loaded
perpendicularly on the specimen.
4.2.4 When the specimen is columned in shape, the V-shaped
testing table must be used. When testing HRC or HRA hardness
value, the diameter of the specimen is smaller than 38 mm and
when testing HRB hardness value, the diameter of specimen is
smaller than 25 mm, the results of the test should be revised. The
revised values are all positive numbers. (Table 4).
4.2 DO ALL PREPARATION WORK BEFORE THE USE
Table 3
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Fig 4
offset of long pointer could not exceed 5 Rockwell hardness
units, otherwise the Rotating Wheel shall turn anticlockwise and
the position of specimen be changed for another repeat test.
4.3.5 Rotate the Dial (2) of the instrument to let long pointer
indicate position “C”.
4.3.6 Press “START” key on the touch panel, the motor
begin to work, the instrument load the test force automatically.
When dwell time of total test force is up, the motor rotates to
unload the test force automatically.
4.3.7 At this time, the data indicated by the long pointer
in dial indicator of the instrument is the hardness value of the
specimen tested (when testing HRB hardness for the specimen,
the hardness value should be readout from the data in the inner
ring of the dial).
4.3.8 The dwell time of total test force for Rockwell hardness
measurement is 5 seconds. The dwell time can be adjusted by
pressing up and down key on the touch plane.
4.3.9 Turn the Rotating Wheel in anticlockwise to let the
Working Table go down, change testing position for other test
and repeat above mentioned operation process.
4.3.10 The number of the point to be tested is not less than 5
(the rst point in not include.) The number of the points to be
tested may be reduced a bit for the specimen tested in a serial.
Hardness value HR
Diameter (mm) of the Columned Specimens
6 10 13 16 19 22 25 32 38
Modied Value (HR) of Rockwell Scales A, C & D
20 2.5 2.0 1.5 1.5 1.0 1.0
25 3.0 2.5 2.0 1.5 1.0 1.0 1.0
30 2.5 2.0 1.5 1.5 1.0 1.0 0.5
35 3.0 2.0 1.5 1.5 1.0 1.0 0.5 0.5
40 2.5 2.0 1.5 1.0 1.0 1.0 0.5 0.5
45 3.0 2.0 1.5 1.0 1.0 1.0 0.5 0.5 0.5
50 2.5 2.0 1.5 1.0 1.0 0.5 0.5 0.5 0.5
55 2.0 1.5 1.0 1.0 0.5 0.5 0.5 0.5 0
60 1.5 1.0 1.0 0.5 0.5 0.5 0.5 0 0
65 1.5 1.0 1.0 0.5 0.5 0.5 0.5 0 0
70 1.0 1.0 0.5 0.5 0.5 0.5 0.5 0 0
75 1.0 0.5 0.5 0.5 0.5 0.5 0 0 0
80 0.5 0.5 0.5 0.5 0.5 0 0 0 0
85 0.5 0.5 0.5 0 0 0 0 0 0
90 0.5 0 0 0 0 0 0 0 0
Table 4
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24. Connecting Rod
25. Screw Nut
26. Screw
27. Protecting Gasket
Hardness Range
(HBW)
Tolerance of
Displayed Value
(%)
Repetition of
Displayed Value
(%)
≤125 ±3 3
125≤HBW≤125 ±2.5 2.5
≤225 ±2 2
Table 5
Table 6
4.4 THE REGULATION OF DISPLAYED HARDNESS VALUE
(Fig.5)
he precision of the displayed hardness value of the hardness
tester is just calibrated before the instrument is turned out of the
factory. If an error is caused due to the transportation, the operator
may regulate it based on the understanding of the instrument
structure and principle. The method is as follows: Remove
the Upper Cover. If the displayed hardness value is in inferior
to the hardness value of standard hardness block, withstand a
screwdriver into the groove of the M4 Screw and unscrew the
nut (25) a little. Rotate the Screw (26) clockwise to forward a bit
(about rotate it half cycle, the hardness value is 1 degree higher),
then calibrate the zero position (C position) for dial indicator,
withstand the Screw Rod and fasten the nut. Do the test and
display hardness value until the diaplayed hardness value stands
in the tolerance range (Table 1). If the displayed value is higher
than the hardness value of the standard hardness block, rotate
the Screw in the opposite direction. (There are screwdriver and
spanner in the accessories kit.)
5. BRINELL HARDNESS
5.1 The Technical Specication of Brinell Hardness Tester
5.1.1 Test Force: 306.5N(31.25Kg), 612.9N(62.5Kg), 1839N
(187.5KG)
5.1.2 Ball Indenter: ф2.5 mm, ф5 mm
5.1.3 The Brinell Hardness Testing Range: 8HBW~650HBW
5.2 The Tolerance and Repetition of Displayed Value for
Brinell Hardness Tester
5.3 The test force should make the indentation diameter
within the range of 0.25D < D < 0.6d: when d = 0.37d, the
hardness value obtained is very accurate (d-indentation
diameter, d-ball diameter).
5.4 Select 0.102F/D2 according to Table 6
5.5 The corresponding relationship among the scale, indenter
and test force (Table 7)
5.6 Preparation Before Use(Ref. 4.2.1, 4.2.2)
The minimum thickness of the test piece should be greater than
10 times the depth of the indentation. After the test, there shall
be no visible deformation marks on the back of the test piece.
(Table 8)
Fig. 5
Material Brinell Hardness 0.102F/D2
Steel —— 30
Cast iron <140 10
≥140 30
Copper & copper
alloys
<35 5
35~130 10
>130 30
Light metals & their
alloys
35 2.5
35~80 5,10
10
F—Test Force (N) D—Ball Diameter (mm)
Hardness Value (HR)
Diameter(mm)of the Columned Specimens
6 10 13 16 19 22 25
Modied Value (HR) of Rockwell Scales B, F & G
20 4.5 4.0 3.5 3.0
30 5.0 4.5 3.5 3.0 2.5
40 4.5 4.0 3.0 2.5 2.5
50 4.0 3.5 3.0 2.5 2.0
60 5.0 3.5 3.0 2.5 2.0 2.0
70 4.0 3.0 2.5 2.0 2.0 1.5
80 5.0 3.5 2.5 2.0 1.5 1.5 1.5
90 4.0 3.0 2.0 1.5 1.5 1.5 1.0
100 3.5 2.5 1.5 1.5 1.0 1.0 0.5
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Hardness Scale Indenter D (mm) Test Force F 0.102F/D2
HBW 10/100 10 980.7N (100kg) 1
HBW 5/62.5 5 612.9N (62.5kg) 2.5
HBW 2.5/187.5 2.5 1839N (187.5kg) 30
HBW 2.5/62.5 2.5 612.9N (62.5kg) 10
HBW 2.5/31.25 2.5 306.5N (31.25kg) 5
HBW 1/30 1 294.2N (30kg) 30
Table 7
Indentation Average
Dimameter (d)
Tested-piece Minimum Thickness
Ball Diameter(D)
D=1 D=2.5 D=5 D=10
Indentation Average
Dimameter (d)
Tested-piece Minimum Thickness
Ball Diameter(D)
D=1 D=2.5 D=5 D=10
Table 8
0.4 0.33
0.5 0.54
0.6 0.8 0.29
0.7 0.4
0.8 0.53
0.9 0.67
1 0.83
1.1 1.02
1.2 1.23 0.58
1.3 1.46 0.69
1.4 1.72 0.8
1.5 2 0.92
1.6 1.05
1.7 1.19
1.8 1.34
1.9 1.5
2 1.67
2.2 2.04
5.7 Proper Use
5.7.1 Refer to 4.3.3-4.3.6 in Chapter 4 of Rockwell hardness
(holding time of Brinell hardness test force; 10-15 seconds for
ferrous metal, 30-35 seconds for non-ferrous metal, and 60
seconds for Brinell hardness value less than 35).
5.7.2 Alignment
Adjust the sliding test bench so that the indentation on the
test piece is directly below the objective lens of the measuring
microscope for observation and measurement. For a small
number of tests, you can move the test piece and take
In the microscope eld of view. During batch test, in order to
save the time of indentation search, the stop screws at both
ends of the sliding test bench can be used for adjustment so as
to make the pressure.
The mark is directly in the visible position of the microscope
eld of view.
Fig 8 Sliding Test Bench Adjustment
5.7.3 Focus
First, rotate the eyepiece on the micrometer eyepiece to the
internal scribe line to achieve the clearest.
By rotating the lifting hand wheel, the up and down movement
of the test piece driven by the lifting lead screw is adjusted
to the most clear test surface or indentation of the test piece
observed from the microscope.
2.4 2.46 1.17
2.6 2.92 1.38
2.8 3.43 1.6
3 4 1.84
3.2 2.1
3.4 2.38
3.6 2.68
3.8 3
4 3.34
4.2 3.7
4.4 4.08
4.6 4.48
4.8 4.91
5 5.36
5.2 5.83
5.4 6.33
5.6 6.86
5.8 7.42
6 8
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At Fig 10
Brinell Hardness Test:
4X obejective lens, indenter Φ2.5, test force 187.5kg.
Indication 3.40mm
Indentation Diameter d=3.40/4=0.85=850μ m,
Hardness Value: 320.6HB
Vickers Hardness Tester:
10X objective lens, test force 30kg
Indication 4.30mm
Indentation Diameter d=4.30/10=0.43mm=430μ m,
Hardness Value:300.9HV
Fig10 measurement and calculation
Fig9 Measurement in Two Vertical Directions
Hardness
Sign
Value of
Hardness
Block
Tolerance of
Displayed
Value
Value of
Hardness
Block
Repetition
of
Displayed
Value
HV30
HV100
≤250HV ±3% ≤225HV 6%
HV100 ±2% >225HV 4%
Table 9
6. VICKERS HARDNESS
6.1 Technical Specications of Vickers Hardness
6.1.1 Test forces: 294.2N(30 Kg), 980.7N(100Kg)
6.1.2 Indenter: Vickers Diamond Indenter
6.1.3 Testing Range of Vickers Hardness: 40HV ~ 1000HV
6.1.4 The Tolerance and Repetition of Displayed Value for
Vickers Hardness Teste (Table 9)
6.1.5 By means of 10X Objective for Vickers hardness testing,
the amplication of measuring microscope is 150X.
6.2 Do all preparation work before do testing.
6.2.1 The surface of the specimen should be smooth and
clean without any feculence, therefore to guarantee the length
of diagonal of indentation could be measured accurately. The
degree of surface nish should not less than 0.8
6.2.2 Put the specimen stably on the testing table, its touching
surface should be clean. It is prohibited to move the specimen
during measurement, and the test force should be loaded on
the specimen keep vertically.
6.2.3 The Min. thickness of specimen or testing layer should
not less than 1.5 times diagonal length of the indentation. After
testing, the back of specimen should not have any visible signs
of deformation.
5.7.4 Illumination Adjustment
The most suitable lighting effect is obtained by rotating or
moving up and down the lamp barrel. Tighten the three knurled
screws after adjustment. The brightness and color of the lighting
light can be adjusted by two buttons on the side of the lighting
barrel to achieve the most appropriate lighting effect.
5.7.5 Measurement and Reading of Indentation Size
Loosen the knurled screw on the eyepiece so that the eyepiece
can rotate without falling. Rotate the micrometer eyepiece so
that its measuring direction is consistent with the diameter or
diagonal direction of the indentation.Align the edge (Brinell) or
vertex (Vickers) of one side of the indentation with the zero line
of the microscope. Rotate the percentile cylinder to move the
index line to the other edge or vertex.
Read out the large number (mm) of the indentation size from
the internal scribe and the decimal number (0.01mm for each
small cell) from the scale of the cylinder. The sum of the two is
the measurement size of the indentation.
Dividing the measured size of the indentation by the
magnication of the objective lens used is the actual size of
the indentation (indentation diameter or indentation diagonal
length).
For example: when using 4x objective, it should be divided by 4;
when using 10x objective, it should be divided by 10 Calculated
hardness value: 300.9hv
6.3 Test Vickers Hardness
6.3.1 Refer to 5.7 of Brinell hardness for the operation sequence
of Vickers hardness tester. It is mainly different from: For ferrous
metals, the holding time of test force is 10-15 seconds, and for
non-ferrous metals is 30 ± 2 seconds;
6.3.2 The measurement of the two diagonals of the indentation
is carried out in two directions perpendicular to each other.
6.3.3 The ratio of the difference between the average value
of hardness test and the hardness value of standard block to
the hardness value of standard block is the indication error of
hardness tester; the ratio of the maximum difference between
hardness values and the average value is the indication
repeatability of hardness tester. Indication error and repeatability
shall be in accordance with (Fig 9)
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