-05-
1.4
Operating condition
environment temp
operating temp-20~+60
storage temp
-30
~+60
relative humidity
90%
Do not use the instrument in strong vibration, magnetic field, erosive substance and
high density powder and dust codictions.
2
Working principle and Diagram of the instrument
2.1
Working principle
An impact body with a spherical test tip made of
tungsten carbide is propelled against the sample
surface by a spring force and then rebounds back.
At a distance of 1mm from the sample surface, the
impact and rebound velocity of the impact body,
when passing through the coil in its coiler holder,
induces in the coil and electric voltage proportional
to the velocities fo the magnet. Leeb hardness as the
follo wing formula:
1.3 Specifications:
appendix two
No
Material
Leeb hardness
HLD
Intension 0
b (MPa)
1
C
350~522
374~780
2
C
500~710
737~1670
3
Cr
500~730
707~1829
4
CrV
500~750
704~1980
5
CrNi
500~750
763~2007
6
CrMo
500~738
721~1875
7
CrNiMo
540~738
844~1933
8
CrMnSi
500~750
755~1993
9
SSST
630~800
1180~2652
10
SST
500~710
703~1676
-24-
Name
Number
Remark
1
main unit
PCS
2
D type impact device
3
Standard leeb hardness block
PCS
4
A Nylon brush A
PCS
5
Support ring
PCS
6
AA alkaline battery
PCS
7
Manual
PCS
8
Alluminum box
PCS
9
software CD
PCS
10
USB cable
PCS
11
B Nylon brush B
For G type
impact
device
12
Irregular type
and support ring
impact device
See appendix 3 and 4
Standard
packing
No
13
Leeb hardness testing
method for metals.
GB/717394-1998
PCS
PCS
O
p
e
ra
ti
o
n
E
x
p
la
n
a
ti
o
n
s
optional
accessory
HL=1000
×
VB/VA
Hl
leed hardness
Vb
rebound velocity
of the impact body
VA
impact velocity
of the impact body
Table 1