Effect of Matrix Alloying of Fe on Friction and Wear Properties of Cu-Based Brake Pad Materials
Effect of Matrix Alloying of Fe on Friction and Wear Properties of Cu-Based Brake Pad Materials
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DOI：
10.1080/10402004.2019.1605010
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发表时间：
2019-05
影响因子：
2.1
通讯作者：
Peng Zhang;Lin Zhang;S. Ren;K. Fu;Peifang Wu;Jingwu Cao;Cairang Shijia;X. Qu
中科院分区：
文献类型：
--
作者：
Peng Zhang;Lin Zhang;S. Ren;K. Fu;Peifang Wu;Jingwu Cao;Cairang Shijia;X. Qu
摘要采用氩气雾化Cu-Fe预合金粉末制备铜基复合材料，在MS 3000摩擦磨损试验机上系统研究了Fe基体合金化对刹车片材料组织和摩擦磨损性能的影响。结果表明，Fe的基体合金化使富铁相在晶粒内部均匀析出，并沿沿着SiO2-基体界面偏聚，在石墨-基体界面附近形成珠光体，有利于铜基体的强化，改善界面结合，保护第三体。当制动速度低于200 km/h时，预合金化试样表现出相对较高的摩擦系数和增强的摩擦稳定性，以及降低的磨损量。在较高的制动速度（>200 km/h）下，富铁相的破碎导致摩擦系数不稳定和高磨损量。
Abstract Argon-gas-atomized Cu–Fe prealloyed powder was used to prepare Cu-based composites, and the effect of matrix alloying of Fe on microstructure and friction and wear properties of the brake pad material was systematically investigated on an MS3000 friction and wear tester. The results indicate that matrix alloying of Fe induces the precipitation of a uniformly distributed iron-rich phase at the interior of grains, the segregation of the iron-rich phase along SiO2–matrix interface, and the formation of pearlite in the vicinity of the graphite–matrix interface, which favors the strengthening of copper matrix, improves interfacial bonding, and protects the third body. The prealloyed sample exhibits relatively high friction coefficient and enhanced friction stability, as well as reduced wear loss when the braking speed is lower than 200 km/h. At higher braking speed (>200 km/h), the breakage of the iron-rich phase leads to an unstable friction coefficient and high wear loss.