7075-T651铝合金摩擦磨损性能研究

Research on the Friction-Wear Properties of 7075-T651 Aluminum Alloy

摘要:

为研究7075铝合金表面质量与摩擦磨损性能间的关系，在摩擦磨损试验机上进行了7075-T651铝合金与Si₃N₄球的对磨实验，探讨了不同表面粗糙度对该铝合金摩擦磨损行为的影响。实验结果表明：试样初始表面粗糙度和摩擦系数，二者之间无明显关系；在1 min的摩擦磨损实验中，试样表面粗糙度为0.074 μm的铝合金磨损量最小为0.12 mg；在磨损过程中，磨损损伤表面存在微切削和挤压剥落的现象，并且出现鳞片状磨痕，主要磨损类型为磨粒磨损。

Abstract:

In this paper， the effect of different surface roughness on the friction-wear behavior of 7075-T651 aluminum alloy with Si₃N₄ balls was carried out in a tribometer. The results shows that there was no significant relationship between the initial surface roughness of the samples and the friction coefficient. In the friction-wear test of 1 min， the aluminum alloy with a surface roughness of 0.074 μm showed the smallest wear loss， which is 0.12 mg. During the wear process， there were micro-cutting and extrusion flaking occurred on the surface of the wear damage， and scale-like wear marks appeared. The main wear type of this aluminum alloy is abrasive wear.