An Analysis of Laser-Welded Nicr-Ir and Nicr-Pt Micro Joints on Spark Plug Electrodes in Biogas-Fuelled Engines

• Autorzy: Grabas B. , Tofil S. , Napadłek W.

Identyfikatory

DOI

10.1515/amm-2016-0194

• Języki publikacji: EN

Abstrakty

EN

The paper deals with the laser beam welding of tips to central and side spark plug electrodes made of a nickel-chromium alloy. The tips attached to the central electrodes were made from a solid iridium wire 0.8 mm in diameter and 2 mm in length, while the tips connected to the side electrodes were made from a platinum wire 1.5 mm in diameter and 0.25 mm in thickness. In both cases, accurate positioning of the tips was required before they were resistance welded to the electrodes. Then, a fillet weld was produced with an Nd:YAG laser using single, partly overlapping conductive pulses. The laser welding was performed at different laser power levels and pulse durations. Metallographic sections of the joints were prepared to observe changes in the microstructure and determine their correlation with the changes in the process parameters. The results were used to select appropriate welding parameters for the materials joined. The microscopic analysis indicated welding imperfections such as micro cracks at the interface between the elements joined. The tips welded to the spark plug electrodes can help extend the service life of spark plugs in highly corrosive environments.

Słowa kluczowe

EN

microwelding; laser; spark plugs; refractory materials; biogas

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2016
• Tom: Vol. 61, iss. 2B
• Strony: 1163--1167
• Opis fizyczny: Bibliogr. 14 poz., rys., tab., wykr.

Twórcy

autor

Grabas B.

• Kielce University of Technology, Department of Terotechnology and Industrial Laser Systems, Faculty of Mechatronics and Mechanical Engineering, 7th Tysiąclecia P. P. Av. 25-314 Kielce, Poland

autor

Tofil S.

• Kielce University of Technology, Department of Terotechnology and Industrial Laser Systems, Faculty of Mechatronics and Mechanical Engineering, 7th Tysiąclecia P. P. Av. 25-314 Kielce, Poland

autor

Napadłek W.

• Military University of Technology, Institute of Motor Vehicles and Transportation, Faculty of Mechanical Engineering, 2 Gen. Sylwestra Kaliskiego Str., 00-908 Warsaw 49, Poland

Bibliografia

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• [10] W. Danilczyk, St. Kruczyński, M. Stępniewski, R. Wołoszyn, Ocena połączeń Pt-NiCr na elektrodach świecy zapłonowej. VII Międzynarodowa Konferencja Naukowo-Techniczna „Logistyka, systemy transportowe, bezpieczeństwo w transporcie“ - LOGITRANS 2010, Szczyrk.
• [11] H. T. Lin, M. P. Brady, R. K. Richards, D. M. Layton, Characterization of erosion and failure processes of spark plugs after filed service in natural gas engines. Wydawnictwo WEAR (1063-1067) (2005).
• [12] S. Javan, S. V. Hosseini, S. Sh. Alaviyoun, An experimental investigation of spark plug temperature in bi-fuel engine and its effect on electrode erosion. International Journal of Automotive Engineering 2(1) (2012).
• [13] G. W. Shoobert, Iridium electrodes increase spark plug life. Platinum Metals Rev. (1962).
• [14] B. Grabas, Sz. Tofil, Mikrospawanie laserowe nakładek irydowych na elektrodę rdzeniową świecy zapłonowej - Sympozjum Katedr i Zakładów Spawalnictwa „Nowoczesne zastosowania technologii spawalniczych”, Brenna 17-18 czerwca 2014

Uwagi

EN

The research reported herein was supported by a grant from the National Centre for Research and Development (No. PBS 1/B5/13/2012).

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę