|
Cylinder liners of Al alloy, LAAPS coated with AlSi
|
|
Currently, several metal alloys on the base of Cobalt and Nickel as well
as aluminium alloys are available for the hybrid spraying technique.
The coatings are entirely dense and have a high adhesion strength to the
substrate. As the figure shows, the expensive surface roughening by grit
blasting, otherwise necessary, can be left out.
Adhesion strength of plasma sprayed and laser/plasma
hybrid sprayed coatings
| |
Laser
1.4 kW
|
Plasma
50 kW
|
Hybrid
1.4 kw laser
20 kW plasma
|
| single layer thickness |
300 - 1500
|
50 - 150
|
100 - 200
|
| welding speed [m/min] |
0.4
|
20
|
12
|
| deposition rate [kg/h] |
0.3
|
6
|
1.2
|
| coating shape |
filigree, precisely localized
|
large area
|
large area
|
| coating structure |
dense
|
porous
|
dense
|
| adhesion |
metallurgical
|
mechanical
|
metallurgical
|
|
