Process and Materials Development for Adherently Sprayed Valve Seats on Aluminum Engine Heads 980329
Thermally-sprayed, composite coatings have been developed and sprayed on aluminum engine heads to replace powdered metal valve seat inserts. The process uses a conventional two-wire arc (TWA) gun with nickel and iron-based wire feedstocks. A unique surface preparation technique was developed to assure excellent coating adhesion. A composite Fe/Fe3O4/Ni/NiO/CrO coating was dynamometer tested using a single-cylinder Rotax engine, and showed improved wear performance over a conventional powdered-metal insert. Details of surface preparation, coating development, tribological properties and engine testing are described in this work.
Citation: Popoola, O., Reatherford, L., and McCune, R., "Process and Materials Development for Adherently Sprayed Valve Seats on Aluminum Engine Heads," SAE Technical Paper 980329, 1998, https://doi.org/10.4271/980329. Download Citation
Oludele O. Popoola, Larry V. Reatherford, Robert C. McCune
Ford Research Laboratory
International Congress & Exposition
SAE 1998 Transactions - Journal of Materials & Manufacturing-V107-5