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.
甘子旸, 刘咏, 吕信群, 谭彦妮, 邹俭鹏. 铅对铜基固体自润滑材料的润滑机理[J]. 粉末冶金材料科学与工程, 2018, 23(3): 238-245.
GAN Ziyang, LIU Yong, LÜ Xinqun, TAN Yanni, ZOU Jianpeng. Lubrication mechanism of copper-based solid self-lubricating materials by lead. Materials Science and Engineering of Powder Metallurgy, 2018, 23(3): 238-245.
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2018, Vol. 23 
