ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
A new technology, duplex ion nitrocarburizing and sulphurizing technology (DINS), forfriction reduction and anti-scuffing applications of diesel engine cylinder was studied. Duplex ionnitrocarburized-sulphurized layer was prepared on the surface of CrMoCu alloy cast iron by usingthe DINS process. The morphology, phase structure and tribological behaviors under sulphurcontained additive lubrication were investigated. Results show that the sulphide surface layer of theduplex layer is mainly composed of close-packed hexagonal structured FeS phase and cubicstructured FeS2 phase. The nitrocarburized sub-surface layer of the duplex layer is mainlycomposed of Fe2C and Fe3N phases. The harder nitrocarburized layer can provide effective supportto the softer sulphide layer and avoid its lamellar tear. The synergistic effect between the duplexlayer and the sulphur contained additive lubricant, resulted in 10% and 33.3% reduction in coefficientof friction and wear volume, respectively, compared with those of the sulphurized surface, and 25%and 50.1% reduction, respectively, compared with those of the plain surface. Bench test of dieselengine further demonstrated that the DINS process can provide the treated cylinder with superiorproperties in anti-scuffing and friction reduction, so that it can be used to prolong the service life ofthe cylinder
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.476.pdf
Permalink