PTA troubleshooting

1. Poor preparation of the surface (oxidized or dirty surface)
2. Too low preheating temperature
3. Wrong parameters / too low welding current resulting in bad bonding

Clean the surface well
Sand blast well
Increase preheat
Increase current

1. Overheating / too high welding current resulting in too high dilution
2. Too fast cooling

3. Critical base material

Reduce welding current
Reduce cooling speed
Slow cooling / controlled cooling
Use buffer layer

1. Poor preparation of the surface

2. Incorrect parameters (welding current, up-slope, down-slope)
3. Humidity due to e.g. poor sealing

Clean the surface well
Sand blast well
Adjust parameters
Replace seals
Flushing equipment with argon

1. Incorrect particle size
2. Non-spherical particles in the powder used

Reduce fines content
Replace the powder