Cu-Ni-Si合金在不同环境介质中的微动磨损行为研究

doi:10.11896/cldb.24050227

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Abstract Cu-Ni-Si alloy is the main preparation material for fasteners and clamp parts in high-speed railway catenary systems. After long-term exposure to complex stresses and fatigue loads, fretting wear occurs on the fastening and mating surfaces of Cu-Ni-Si alloy parts, and further fretting corrosion occurs under the erosion of atmospheric pollutants and acid rain. In this study, fretting wear and fretting corrosion tests of Cu-Ni-Si alloy were carried out on a fretting corrosion tester. The fretting wear mechanism and fretting corrosion behavior of Cu-Ni-Si alloy in atmospheric environment, pure aqueous solution and acidic NaCl solution of pH=3 and pH=5 were studied comparatively. The results show that the average friction coefficient in the atmospheric environment is at a high level for a long time and is more than 0.8, while the average friction coefficient in the aqueous solution environment is significantly lower than that in the atmospheric environment, both of which are lower than 0.4. Especially in the acidic NaCl solution of pH=3, the average friction coefficient is about 0.2. Under the condition of F_n=80 N,D=60 μm, the maximum wear depth is about 18 μm in atmospheric environment at room temperature. However, the wear depth decreases significantly in aqueous solution, especially in acidic NaCl solution of pH=3, which is about 10 μm. In the atmospheric environment, the fretting wear was mainly adhesive wear, abrasive wear and oxidation wear, while the material loss in acid solution was induced by the cutting wear of Si₃N₄ ceramic ball’s convex peak and fretting corrosion. In acid corrosion medium, fretting accelerates corrosion, while corrosion suppresses wear.

Key words： high-speed railway catenary system Cu-Ni-Si alloy fretting wear fretting corrosion

Published: 10 July 2025 Online: 2025-07-21

CLC number:

TH117.1

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	Articles by authors
	LI Gen
	YUAN Xinlu
	ZHANG Xiaoyu
	TANG Xuwang
	REN Pingdi

Cite this article:

LI Gen,YUAN Xinlu,ZHANG Xiaoyu, et al. Fretting Wear Behavior of Cu-Ni-Si Alloy in Different Environmental Media[J]. Materials Reports, 2025, 39(13): 24050227-8.

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https://www.mater-rep.com/EN/10.11896/cldb.24050227 OR https://www.mater-rep.com/EN/Y2025/V39/I13/24050227

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