This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Process and Materials Development for Adherently Sprayed Valve Seats on Aluminum Engine Heads
Annotation ability available
Sector:
Language:
English
Abstract
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.
Recommended Content
| Ground Vehicle Standard | Thread Rolling Screws |
| Ground Vehicle Standard | Steel Self-Drilling Tapping Screws |
Authors
Topic
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.Also In
References
- Dooley, D. Trudeau T. Bancroft D. “Materials and Design Aspects of Modern Valve Seat Inserts,” 55 63 Valvetrain System Design and Materials Bolton H. A. Larson J. M. Materials Park, OH ASM International 1997
- Rodrigues, H. “Sintered Valve Seat Inserts and Valve Guides: Factors Affecting Design, Performance and Machinability,” 107 119 Valvetrain System Design and Materials Bolton H. A. Larson J. M. Materials Park, OH ASM International 1997
- Yen, C. M. Chang U. I. “Surface Alloying and Heat Treating Processes,” June 12 1979
- Kawasaki, M. Mori K. Takagi S. Ueda K. “Aluminum Alloy Cylinder Head with Valve Seat Formed Integrally by Copper Alloy Cladding Layer and Underlying Alloy Layer,” Feb. 9 1988
- Kawasaki, M. Takase K. Kato S. Nakagawa M. Mori K. “Development of Engine Valve Seats Directly Deposited onto Aluminum Cylinder Heads by Laser Cladding Process,” Society of Automotive Engineers Paper 920571 1992
- Yamaguchi, J. “Bonded Valve Seat Allows Valve Enlargement,” Automotive Engineering 105 2 124 125 1997
- McCune, R. C. “Thermal Spraying of Cylinder Bore Surfaces for Aluminum Engine Blocks,” Welding Journal 74 41 47 1995
- Byrnes L. Kramer M. “Method and Apparatus for the Application of Thermal Spray Coatings onto Aluminum Engine Cylinder Bores,” 39 42 1994 Thermal Spray Industrial Applications, Proc. 7th. National Thermal Spray Conf. Berndt C.C. Sampath S. Materials Park, OH ASM International 1994
- Nakagawa, M. Shimoda K. Tomoda T. Koyama M. Ishikawa Y. Nakajima T. “Development of Mass Production Technology of Arc Spraying for Automotive Engine Aluminum Alloy Valve Lifters.,’ 457 464 Thermal Spray Research and Applications, Proc. 3rd. National Thermal Spray Conf. Bernecki T. F. Materials Park, OH ASM International 1990
- Zaluzec, M. J. McCune R. C. Popoola O.O. Baughman J. R. Brevick J. E. “Method of Depositing and Using a Composite Coating on Light Metal Substrates,” Jan. 14 1997
- Jeswani M. L. Wear 51 227 1978
- koenig W. Dauw D. F. Levy G. Panten U. Annals of the CIRP 37 2 62 1988