Laser spraying

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The laser spraying (also laser powder coating ) is a thermal coating process .

In laser spraying, a powdery filler material, the so-called spray additive, with a particle size distribution of less than 100 nm is introduced into the laser beam focused on the workpiece via a nozzle and thrown onto the workpiece surface with the help of a gas. By means of laser radiation, both the powder and a minimal part of the component surface are melted and the added spray additive is metallurgically bonded to the component material. After the focusing optics, the laser beam emits the gas, usually argon , which on the one hand prevents the oxidation of the melt and on the other hand transports the spray additive. It is therefore a protective gas and a carrier gas at the same time.

The area of ​​application of laser spraying is, for example, the partial coating of punching or cutting tools .

Individual evidence

1. ↑ What is thermal spraying. Retrieved February 1, 2018 .