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Dissimilar Friction Welding for Marine Shock Absorber Steels and its Evaluation by Acoustic Emission  

LEE BAE-SUB (Department of Computer Aided Mechanics, Incheon Polytechnic College)
KONG YU-SIK (School of Mechanical Engineering, Pukyong National University)
KIM SEON-JIN (School of Mechanical Engineering, Pukyong National University)
Publication Information
Journal of Ocean Engineering and Technology / v.19, no.1, 2005 , pp. 44-48 More about this Journal
Abstract
The shock absorbers for marine vehicles are very important components to absorbing the shock resulting from driving. Depending on the kinds of vehicles, these essential components, piston and piston rod, must be made of S25C, S45C, and SCM440, must be precisely machined, and assembled by the bolts. Other materials used have been difficult to weld, and could be unstable in quality, by the conventional arc welding. Also, they have been associated with a lot of technical problems in manufacturing. However, using the friction welding technique, such problems will be avoided. These factors have necessitated the domestic development of the marine shock absorber using a friction welding, as well as stimulating a new approach to the study of real-time weld quality evaluation by AE techniques.
Keywords
Shock Absorber; Friction Welding (FRW); Acoustic Emission (AE); Weld Interface; Heat Affected Zone (HAZ);
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