Preparation and Tribological Behavior of Self-Lubrication Composites Ni-W-Cr-Fe-Cu-MoS₂-Graphite at Elevated Temperature

Abstract:

The composites of Ni-W-Cr-Fe-Cu-MoS2-Graphite with nano-MoS2 were prepared by powder metallurgy. Its tribological properties were investigated using the UTM-2 Nano+Micro Tribometer from room temperature to 600°C. The effects of amount of MoS2 and Ni-W-Cr prealloy powder, load, and temperature on the tribological properties were investigated and discussed. The results indicated that the addition of 43~45wt.% Ni-W-Cr prealloy powder had a strengthening effect on the hardness, anti-press and tensile strength. The tensile strength of the composite decreases with the addition of Nano-MoS2 and graphite, and the friction coefficient decrease with increase of the additives over the wide temperature range of 25°C∼600°C. The friction coefficients and wear rates of the composites reach the optimization value at 2.5wt.% MoS2,While its wear rates increase with the increasing temperature and load.

• Periodical: Advanced Materials Research (Volume 668)
• Pages: 3-8
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.668.3
• Online since: March 2013
• Authors: Jian Rong Sun, Chang Sheng Li, Hua Tang, Zhi Cheng Guo, Jin Ying Zi Liu
• Keywords: High-Temperature, MoS₂, Ni-W-Cr, Powder metallurgy, Self-Lubrication

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