周亚军,张鑫,张永振,张玉娟,申凯

• 1:河南科技大学高端轴承摩擦学技术与应用国家地方联合工程实验室
• 2:河南科技大学材料科学与工程学院
• 3:黄河科技学院

摘要(Abstract)：

采用化学镀的方式在鳞片状石墨表面镀铜来改善铜基制动闸片中石墨和铜基体的界面结合，制定了化学镀铜配方及工艺，并研究了4种不同镀液温度对镀铜效果的影响。对镀铜后的石墨进行显微组织观察和能谱分析可知：随镀液温度的升高，镀铜效果先升后降，最好的施镀温度为50℃。用热压烧结法制备出镀铜石墨/铜基制动闸片(FM1)与非镀铜石墨/铜基制动闸片(FM0),并对其进行力学性能、物理性能测试以及制动测试，并采用扫描电镜和能谱仪对制动闸片在制动前后的表面形貌进行观察及分析。结果表明：与FM0相比，FM1中石墨分布更细小均匀，因此样品的致密度较高，硬度、抗压强度和热导率也随之增大。在不同制动初速度下，随制动初速度的提高，两种闸片的摩擦系数均出现先略微增高、后平稳，然后显著降低的趋势，但FM1的摩擦系数总体比FM0的摩擦系数更高且稳定，线磨损率也相对较小。在350 km/h高速制动条件下，由于摩擦热引起的材料表面软化，两种制动闸片的摩擦系数差别不大，都呈现显著下降趋势。

关键词(KeyWords)： 镀铜石墨;化学镀;铜基制动闸片;施镀温度;摩擦系数

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(92266205 E0505);; 河南省教育厅骨干教师项目(2020GGJS271);河南省教育厅科技攻关项目(21A460020);; 郑州市科技攻关项目(ZZSZX202105)

作者(Author): 周亚军,张鑫,张永振,张玉娟,申凯

DOI: 10.13289/j.issn.1009-6264.2024-0031

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