Laser Hardening Process for Engine Components

This technical report describes the application of laser hardening in the manufacturing of engine components, specifically focusing on the CAMTRONIC engine management system developed by Mercedes-Benz. The report outlines the advantages of laser hardening, including its low heat input, which minimizes distortion effects and allows for processing of complex geometries. It details the collaboration between Daimler AG and various technology centers to develop a low-distortion laser hardening process tailored for the intricate design of cam pieces. The report explains the challenges faced in achieving optimal temperature control during the hardening process and the innovative solutions implemented, such as the coaxial arrangement of the pyrometer with the laser beam for precise temperature measurement. Furthermore, it discusses the automation of production processes and the successful integration of this technology into high-volume manufacturing, highlighting the significant reduction in heat load compared to conventional methods. The findings demonstrate the feasibility and efficiency of laser hardening for modern engine components.