CYLINDER HEAD WITH VALVE SEAT AND METHOD FOR THE PRODUCTION THEREOF

摘要

Cylinder head (1) made of cast iron with a valve seat (3) and a method for the production thereof. It is proposed to first apply a nickel-based intermediate layer (4) to the pre-treated cast-iron material, for example using a technique in which an energy beam from a welding source is used, e.g. laser cladding. Subsequently, one more contact layers (5,6) are applied, i.e. layers which are in contact with the closing valve (2). These are preferably applied using the same technique and comprise an air-hardening tool steel. This application method may result in compressive strength in the contact layer. Thus, no formation of cracks is detected in the contact layer and a high fatigue strength is achieved.