A study on the restoration method of friction, wear and fatigue performance of remanufactured crankshaft

Crankshaft translates reciprocating linear piston motion into rotation in internal combustion engine. So it receives complex combination of stresses. Therefore, crankshaft remanufacturing process is designed thoroughly with special attention to fatigue and tribological performance. Experimental stud...

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Bibliographic Details
Published in:Journal of mechanical science and technology 2013, 27(10), , pp.3047-3051
Main Authors: Tominaga, Yasutoshi, Kim, Jinsoo, Pyun, Youngsik, Kayumov, Ravil, Kim, Junhyong, Woo, Juha
Format: Article
Language:English
Subjects:
Control
Crankshafts
Dynamical Systems
Engineering
Fatigue (materials)
Friction
Industrial and Production Engineering
Mechanical Engineering
Nanocrystals
Remanufacturing
Restoration
Tribology
Vibration
Wear
기계공학
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Summary:Crankshaft translates reciprocating linear piston motion into rotation in internal combustion engine. So it receives complex combination of stresses. Therefore, crankshaft remanufacturing process is designed thoroughly with special attention to fatigue and tribological performance. Experimental study is carried out in order to show that UNSM (ultrasonic nanocrystal surface modification) technology which will be used as final surface treatment after 0.2 mm depth surface grinding, could restore original fatigue strength and tribological performance. Furthermore the feasibility steady to replace conventional overlay welding in crankshaft remanufacturing process by UNSM (ultrasonic nanocrystal surface modification) technology is carried out. Effects of UNSM technology are established through rotary bending test, rolling contact fatigue (RCF) test and wear simulation test. The test specimen used SCM435 material of crankshaft and commercial bush. The test result showed fatigue limit improved by 30% and RCF life increased by 40% for UNSM treated specimen. And friction coefficient decreased by 24% and wear amount decreased by 85%.
ISSN:1738-494X
1976-3824
DOI:10.1007/s12206-013-0824-1