Development of the Self-Lubricating Steels by Compression of Granulated Powders

Abstract:

Self-lubrication composites containing second phase particles incorporated into the volume of the material appears to be a promising solution for controlling friction and wear in modern systems. The objective of this work was the development of steels with low friction coefficient using granulated powders through a precursor (SiC), which generate carbon nodules in a ferrous matrix. The studied alloy composition was Fe+0,6C+3SiC using 2 wt.% of EVA as binder. In this study, the influence of the average size of the iron particles and silicon carbide (SiC) in the microstructure, mechanical and tribological properties was evaluated. The powders were first mixed in a "Y" type mixer, granulated drum, compressed and sintered in plasma in a single thermal cycle assuring binder extraction and sintering of components. The achieved results were close to those of alloys of the same composition produced via powder injection molding (PIM) but with processing time and cost close to those of conventional powder metallurgy (PM). Materials with yield strength of 250 MPa, durability of 2800 Nm and 0.11 friction coefficient were obtained.

• Periodical: Materials Science Forum (Volume 899)
• Pages: 299-304
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.899.299
• Online since: July 2017
• Authors: V.B. Demetrio*, Tatiana Bendo, Cristiano Binder, Gisele Hammes, P.F. Orsi, José Daniel Biasoli de Mello, Aloísio Neumo Klein
• Keywords: Granulation, Powder metallurgy, Self-Lubricating

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DOI: 10.5196/physicae.v11i11.311

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