
Deposition techniques
Laser Cladding
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
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Problems with laser cladding?
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 |

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