|
PMalloy
21
|
Wear-resistant
Fe-based alloy |
|
Wear-resistant Fe-based alloy powder for surfacing
of parts operated under abrasive wear. PMalloy 21
combines high wear resistance with high ductility.
The unique combination of properties gives the possibility
to carry out surfacing without preheating. This original
powder is used successfully for extruder screws hardfacing.
Alloy characteristics:
|
| 1. Chemical composition: |
| 2.2% C; 18% Cr; 3% Ni; 2% Mo; 9% V; 1%
Si; 1% Mn; Fe - balance |
| 2. Micro structure of cladded layer |
 |
Fig.1. Micro
structure layer cladded with PMalloy 21 |
| 3. Wear resistance |
| Resistance of PMalloy 21 against
the abrasive wear in comparison with another alloys
for surfacing is shown at Fig. 2. |
Fig.2 |
Chemical compositions of these alloys are shown at the
Table. |
|
Alloy Nr.
|
Chemical composition
|
Hardness, HRC
|
|
C
|
Si
|
Mn
|
Cr
|
B
|
W
|
Ni
|
Co
|
Fe
|
|
1
|
0,7
|
3,9
|
-
|
15,8
|
3,2
|
-
|
Balance
|
-
|
<=3
|
58
|
|
2
|
1,1
|
2,1
|
-
|
28,1
|
-
|
4,4
|
-
|
Balance
|
-
|
42
|
|
3
|
2,7
|
2,9
|
2,7
|
28,6
|
-
|
-
|
4,3
|
-
|
Balance
|
46
|
|
| 4. Influence of release temperature |
|
A specimen was exposed 1 hour and cooled on the air.
Properties of cladded material in dependence of release
temperature are shown at Fig. 3 and 4.
 |
Fig.3. Hardness, wear resistance
and amount of residual austenit in cladded material
in dependence of thermal post-treatment. |
 |
Fig.4. Impact toughness and tensile
strength of cladded material in dependence of
thermal post-treatment. |
|
