刷丝硬度对Au9Ni/Au35Ag5Cu对偶电接触及摩擦磨损行为的影响

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Abstract The Au9Ni alloy wires with hardness of 230.51, 251.93 and 270.30 HV were used as the research objects. The current-carrying wear mechanism of the Au9Ni alloy wire was studied, and the relationship between hardness and its current-carrying friction and wear behavior has also been explored in atmospheric. The results show that the brush hardness has an important influence on their tribological properties of the atmospheric current. As the brush hardness increased from 230.51 HV to 270.30 HV, the average friction coefficient and contact voltage drop of the material increased from 0.82, 46.42 mV to 1.02, 98.72 mV, respectively, and during the friction period, bouncing is weakend by increased hardness the electrical noise (R_RMS) decrease from 6.15 mΩ to 3.37 mΩ that means the curve of friction and contact stability were improved. With the increase of hardness, the roughness of worn surface (Ra) decrease from 1.10 μm to 0.57 μm the wear mechanism of brush with hardness of 230.51 HV is mainly adhesive wear. As the brush hardness increases, the wear mechanism gradually evolves into a composite wear mechanism with adhesive wear and abrasive wear.

Key words： gold alloy hardness electrical sliding friction coefficient contact voltage drop wear mechanism

Received: 01 March 2019 Published: 12 July 2019

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TG146.3

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	QU Qiang
	ZHOU Xiong
	LUO Bo
	ZHANG Lei

Cite this article:

QU Qiang,ZHOU Xiong,LUO Bo, et al. Effect of brush hardness on electrical contact and tribological behavior of Au9Ni against Au35Ag5Cu disc[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(4): 321-328.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I4/321

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