Effect of double pressing/double sintering on the sliding wear of self-lubricating sintered composites

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• 作者：Gisele Hammes ; Renan Schroeder ; Cristiano Binder ; Aloisio N. Klein ; Jose Daniel B. de Mello
• 关键词：Solid lubrication ; Self-lubricating composites ; Powder metallurgy ; Double pressing/double sintering
• 刊名：Tribology International
• 出版年：February, 2014
• 年：2014
• 卷：70
• 期：Complete
• 页码：119-127
• 全文大小：7634 K

文摘

This work presents the effect of a double pressing/double sintering technique on the sliding wear of self-lubricating composites. The matrix composition was based on that of a Fe-Mo-C-Si alloy, and the solid lubricants were h-BN and graphite. Sliding tests were carried out first at a constant load. Subsequently, scuffing tests with loading steps of 7 N/10 min were also performed. The wear rates of both specimens and counter-bodies and the average friction coefficient were slightly affected by the compaction technique. DPDS specimens showed higher scuffing resistance. The scuffing resistance depends to a great extent on the mechanical support provided by the matrix. DPDS significantly reduced the sub-surface porosity and, as a consequence, the scuffing resistance.