石墨表面改性对铜基摩擦材料组织与性能的影响

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Abstract Cu-based friction material were prepared by powder metallurgy technology with natural flake graphite and phenolic resin coated graphite as lubricating components. The effects of graphite surface modification on the microstructure, physical properties, mechanical properties and friction and wear properties of Cu-based friction materials at different braking speeds were studied. The results show that, compared with natural flake graphite/copper-based friction materials, the Cu-based friction materials with resin-coated graphite powder have more uniform graphite distribution, denser copper matrix, higher density, lower porosity, higher flexural strength and compressive strength. When the braking velocity is 5 500 r/min, the wear extent of the phenolic resin-coated graphite/Cu-based friction material is reduced by 24%, the matching plates wearing capacity is reduced by 40%, and the braking time is shortened by 11%. Compared with the natural flake-graphite, the deformation and failure of the resin coated graphite material decreases obviously, and the friction and wear properties of the resin coated graphite material increases.

Key words： Cu-based friction material phenolic resin-coated graphite friction wear

Received: 29 November 2018 Published: 12 July 2019

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TG146.1

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	Articles by authors
	LIU Tan
	XIAO Peng
	FANG Huachan
	LI Jinwei
	ZHU Jiamin
	CHEN Zhuo
	WU Junbo

Cite this article:

LIU Tan,XIAO Peng,FANG Huachan, et al. Effect of graphite surface modification on microstructure and properties of Cu-based friction materials[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(2): 195-204.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I2/195

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