Source: Fraunhofer ILT, Volker Lannert
“The EHLA process is ideal for use in the automotive industry, especially for coating brake discs,” according to Thomas Schopphoven, research fellow and team leader for productivity and system technology with the Laser Material Deposition group at Fraunhofer ILT. “Conventionally, it’s very difficult to coat brake discs because they have to withstand high loads, and there are also economic and environmental considerations. But, with EHLA it’s possible now to apply coatings that form a metallurgical bond with the base material of the disc and therefore adhere very strongly. Unlike conventional coatings, these do not flake and chip.”
Coatings produced by conventional processes are porous and likely to crack upon hardening. With the EHLA process, the coating remains intact and thus forms a longer-lasting, more effective seal for the casting surface. This extends the service life of the casting, and prevents early failure as a result of damage to the surface of the brake disc. Moreover, the EHLA process is suitable for a range of materials, not only gray iron, so it is possible to define an environmentally friendly coating for a specific application.
In fact, the process is a new process variant on laser material deposition, which has been proven very effective in critical applications, such as repairing turbine blades.
Source and more information’s: Fraunhofer ILT