Failure analysis of the exhaust valve face in diesel marine engine

• Autorzy: Smoleńska H. , Kończewicz W.
• Języki publikacji: EN

Abstrakty

EN

The exhaust valve from marine diesel engine which was damaged after 2000 hours of service was investigated. In order to prolong the service time the valve face was cladded with cobalt base alloy using laser technique. After failure microstructural and chemical analyses reviled that cladding process was conducted improperly. The chemical composition of the clad layer was far from the designed one and what more completely inhomogeneous. As a result the valve presented different properties in different regions which led to premature failure.

Słowa kluczowe

EN

cobalt base alloy; laser cladding; wear

• Wydawca: Politechnika Gdańska
• Czasopismo: Advances in Materials Science
• Rocznik: 2010
• Tom: Vol. 10, nr 2(24)
• Strony: 11--18
• Opis fizyczny: Bibliogr. 6 poz., rys., tab.

Twórcy

autor

Smoleńska H.

autor

Kończewicz W.

• Gdańsk University of Technology, Faculty of Mechanical Engineering, Department of Materials Science and Engineering, Gdansk, Poland

Bibliografia

• 1. Qixian S., Yan S., Development of Laser Cladding Stellite F Alloy On Valve Face, Seoul 2000 FISITA World Automotive Congress ;June 12-15, 2000, Seoul, Korea.
• 2. Schlager D., Theiler C., Kohn H., Protection against high temperature corrosion with laser welded claddings, applied and tested on exhaust valve discs of large diesel engines burning heavy fuel oil, Materials and Corrosion 53 (2002), 103-110.
• 3. Nando, S.K., Roskilly, A.P., Exhaust valve failure under residual fuel operation, Journal of Marine Design and Operations, B2 (2003), 23-28.
• 4. Lijun H., Kaushik M. P., Liou F. W., Modeling of laser deposition and repair process, Journal of Laser Applications, 17 (2005), 89-99.
• 5. High-Temperature Oxide Regrowth on Mechanically Damaged Surfaces; P. J. Blau, T. M. Brummett; Tribol Lett., 32 (2008), 153–157.
• 6. A study of exhaust valve and seat insert wear depending on cycle numbers; Keyoung Jin Chun, Jae Hak Kim, Jae Soo Hong; Wear, 263 (2007), 1147–1157.