surface hardening
≥
0.8mm
≥
0.8mm
≥
0.2mm
≥
1.2mm
≥
0.8mm
Size of tip indentation
Hardness
300HV
Indentation
diameter
Depth of
indentation
0.54mm
24
μ
m
0.54mm
24
μ
m
0.38mm
12
μ
m
1.03mm
53
μ
m
0.54mm
24
μ
m
Hardness
600HV
Indentation
diameter
Depth of
indentation
压痕深度
0.54mm
17
μ
m
0.54mm
17
μ
m
0.32mm
8
μ
m
0.90mm
41
μ
m
0.54mm
17
μ
m
Hardness
800HV
Indentation
diameter
Depth of
indentation
0.35mm
10
μ
m
0.35mm
10
μ
m
0.35mm
7
μ
m
--
--
0.35mm
10
μ
m
Available type of impact
device
DC: Test hole
or hollow
cylindrical;
DL:Testslender
narrow groove
or hole
D
+15: Test
groove
or
reentran
t surface
C: Test
small,light,thi
n parts and
surface of
hardened
layer
G:
Test
large,
thick,heavy
and rough
surface steel
E:
Test super
high
hardness
material
Table 4
No.
Type
Sketch of
non-conventional
Supporting ring
Remarks
1
Z10-15
For testing cylindrical outside
surface R10
～
R15
2
Z14.5-30
For testing cylindrical outside
surface R14.5
～
R30
3
Z25-50
For testing cylindrical outside
surface R25
～
R50
4
HZ11-13
For testing cylindrical inside
surface R11
～
R13
5
HZ12.5-17
For testing cylindrical inside
surface R12.5
～
R17
6
HZ16.5-30
For testing cylindrical inside
surface R16.5
～
R30
7
K10-15
For testing spherical outside
surface SR10
～
SR15
19
209
