Deposition techniques
Laser Cladding
Laser cladding is a technique that bonds alloys to the surface with a low degree of dilution and it is particularly suited for use in high volume automated applications.
Process
Laser cladding is a surface welding method that enables a metallurgical bonding with the base material substrate, like in case of PTA surface welding.The overlays can be applied to most Fe and Ni based substrates with some exceptions.
A high energy laser beam creates an intense heat input and thus alloys are bonded to the surface with a low degree of dilution (<5%). Laser cladding can be fully automated and thus once the parameters are fixed for a certain design, consistent final results are achieved for all parts.
Typical working range
- Deposition rate: up to 8 kg/hour
- Deposition thickness: 0.5 - >4 mm
- Deposition hardness*: >22 - 61 HRC
* Typical for PTA welding / 5% -10% higher with laser cladding
Benefits
- Suitable for automation
- No fusing required
- 0.5->4 mm thickness
Problems with laser cladding?
Laser cladding troubleshooting
| Problem | Cause | Solution |
| Deposit peels off | 1. Poor preparation of the surface (oxidized or dirty surface) 2. Too low preheating temperature 3. Too fast cladding speed 4. Wrong parameters / Bad bonding |
Clean the surface well Increase preheat Increase power |
| Cracks |
1. Overheating / too high welding power, too high dilution |
Reduce welding power |
| Porosity |
1. Poor preparation of the surface |
Clean the surface well |
| Clogging |
1. Incorrect particle size |
Reduce fines content Adjust and control the cooling water temperature |
ArcX coating hub
Your starting point for innovation
Expert know-how in materials, surface welding and flame spraying processes and customer applications make our four technology centres an exclusive resource in your work to optimise existing applications and develop new business opportunities.