Analysis and Solution of Splashing in Alloy Powder Laser Cladding

Analysis of Splashing Causes in Laser Cladding of Alloy Powder
The occurrence of splashing phenomenon during laser cladding of alloy powder is mainly due to the following reasons:

1. Insufficient surface roughness of the material
If the surface roughness of the material is insufficient, when the laser is irradiated onto the surface of the material, a film layer will be formed, which will burst when melted, leading to the occurrence of splashing phenomenon.
2. Laser power too high or too low
Excessive laser power can easily lead to excessive melting of the material surface, resulting in splashing phenomenon; If the laser power is too low, it is easy to cause insufficient melting of the material surface, and splashing phenomena may also occur.
3. The melting speed is too fast
If the melting speed is too fast, it will cause insufficient melting of the material surface, resulting in splashing phenomenon.
4. Uneven powder distribution
If the powder distribution is uneven, some areas may experience excessive melting, while others may experience insufficient melting, leading to the occurrence of splashing.

Solution to laser cladding splashing of alloy powder
For the above reasons, we can adopt corresponding solutions:
1. Improve the surface roughness of materials
By improving the surface roughness of the material, the laser can better absorb energy, thereby reducing the occurrence of splashing phenomena.
2. Optimize laser power and cladding speed
During the melting process, it is necessary to optimize the laser power and melting speed according to the properties and requirements of the material to ensure the smooth progress of the melting process.
3. Uniformly distribute powder
In the process of powder spraying, it is necessary to pay attention to the uniform distribution of powder to avoid excessive melting and insufficient melting, thereby reducing the occurrence of splashing phenomenon.
4. Adopt other cladding methods
If the above methods cannot solve the splashing phenomenon, other cladding methods such as plasma spraying, flame spraying, etc. can be considered.

Summary: The splashing phenomenon during the laser cladding process of alloy powder may affect the quality and efficiency of the alloy cladding parts. By analyzing the splashing phenomenon during the melting process, we can find corresponding solutions to improve the quality and efficiency of alloy powder laser melting.