铅对铜基固体自润滑材料的润滑机理

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Abstract Using copper-tin as matrix, graphite and lead as solid lubricant, the new solid self-lubricating material that is suitable for high speed and heavy load condition was fabricated by powder metallurgy. The effects of lead on high-temperature mechanical properties and tribological behavior of materials were investigated. Through the investigation on the friction surface and the subsurface surface, the cooperative lubrication mechanism of lead and graphite was discussed. The results show that the hardness and tensile strength can be markdly increased by adding lead in copper graphite material. Adding lead can also increase high-temperature compression strength below 300 ℃. The compressive strength of the material at 300 ℃ is 215.3 MPa. Meanwhile, the friction stability of copper graphite material under high speed and heavy load condition can be significantly improved by adding lead, and the average friction coefficient is reduced slightly.

Key words： Pb copper-graphite material high speed friction microstructure lubrication mechanism

Received: 12 October 2017 Published: 12 July 2019

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TF125.211

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	Articles by authors
	GAN Ziyang
	LIU Yong
	LÜ Xinqun
	TAN Yanni
	ZOU Jianpeng

Cite this article:

GAN Ziyang,LIU Yong,LÜ Xinqun, et al. Lubrication mechanism of copper-based solid self-lubricating materials by lead[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(3): 238-245.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2018/V23/I3/238

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