ABSTRACT

Three kinds of laser surface texture (LST), i.e. square pit-textured surface (SPTS), round pit-textured surface (RPTS) and groove-textured surface (GTS), are fabricated on the flat brass (H65) sample surfaces. The current-carrying tribological behaviour of these surfaces are investigated. It is noticed the COFs of smooth surface, SPTS and RPTS are all greater than 0.6 after the test, while the GTS has the lowest COF, which remains around 0.2 throughout the test. The vibration signals detected from all surfaces indicate the larger COF will not trigger the FIV generation in this state. All the texture surfaces will not cause electrical contact breaks. Worn surface analysis indicates the wear level of GTS is the weakest, with slight damage and debris accumulation occurs along the groove edges. Finite element analysis is performed to calculate the variation of contact force, contact temperature and voltage signal, and the test results can be well explained.

摘要

在平坦的黄铜(H65)样品表面上制备了三种激光表面织构(LST)，即方形凹坑织构表面(SPTS)、圆形凹坑织构表面(RPTS)和凹槽织构表面(GTS)。研究了这些表面的载流摩擦学行为。可以注意到，光滑表面、SPTS和RPTS在测试后的COF均大于0.6，而GTS的COF最低，在整个测试过程中始终保持在0.2左右。从所有表面检测到的振动信号表明，在此状态下较大的 COF 不会触发 FIV 生成。所有纹理表面都不会导致电接触中断。磨损表面分析表明GTS的磨损程度最弱，沿沟槽边缘有轻微损坏和碎屑堆积。