Deposition techniques

Deposition techniques

Powder welding troubleshooting

Problems with your powder welding process?

Problem Cause Solution
Deposit peels off 1. Poor preparation of the surface (oxidized or dirty surface)
2. Required surface roughness is >Ra 5
3. Too low preheating temperature
4. Too high preheating temperature
5. Too high content of S & Ti in the cast iron base

Clean the surface well
Sand blast well
Preferable >Ra10
Increase preheat
Decrease preheat

Cracks

1. Overheating
2. Too fast cooling
3. Hardened base material

Slower cooling / controlled cooling

Porosity

1. Poor preparation of the surface
2. Incorrect spray parameters
3. Poor sealing in the torch
4. Incorrect particle distribution for the torch
5. Incorrect work method with the weld pool
6. Cast iron base contains inclusions

Clean the surface well
Sand blast well
Adjust parameters
Replace seals

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