PTFE复合材料与其转移膜的摩擦学对应性研究

The Study of Correspondence on Tribology of PTFE Composites and Its Transfer Films

利用RFT–Ⅲ型往复摩擦磨损试验机分别在45#钢和2024Al基底表面制备了一系列bronze/PTFE复合材料转移膜,利用JSL–5600LV型扫描电子显微镜和DFPM静动摩擦因数精密测定仪分别对整体材料的磨损表面、转移膜形貌及其摩擦学性能进行了评价。结果表明,随填料含量的增加复合材料的磨损率降低,其相应转移膜的均匀性和耐磨性也提高。bronze/PTFE复合材料与其转移膜间存在良好的对应关系,即材料的磨损率越低其转移膜的耐磨性越好,且这种对应关系不受基底材料变化的影响。

The transfer films of bronze/PTFE composites prepared on AISI-1045 steel bar and 2024A1 bar surface used a RFT-Ⅲ style friction and wear tester. Morphologies of the transfer films, worn surface of the composites were observed on a JSM-5600LV scanning electron microscope. Tribological properties of the transfer films were tested on a DFPM reciprocating tribometer. It is found, to PTFE composites filled with bronze filler, wear resistance capability of composites and wear life of corresponding transfer film has good correspondence, i. e., the better the wear resistance capability of the bulk composite, the longer the wear life of corresponding transfer film. The effect of substrate on wear life of transfer film is remarkable. Under the same condition, the tribological properties of transfer films and corresponding composites on AISI-1045 steel surface are better than that on 2024A1 surface. Furthermore, difference on substrate has no effect on correspondence between wear resistance capability of bronze/PTFE composites and wear life of the transfer films.