Optimization of Tribological Properties and Its Wear Mechanism of a New Type Friction Materials with Response Surface Methodology

Abstract

Preparation technology of an organic high friction composite materials was optimized by RSM(response surface methodology) and Design-Expert software. The friction tests were performed by MMS-2A friction tester. The quadratic regression model was established between process parameters and friction coefficient and wear rate. The results show that the correlation between predictive value and test value of the quadratic regression models has good fitting precision which are 91.97% and 87.85% respectively. There is strong interaction between molding temperature and holding time in the hot-pressing technology. Macro and micro surface morphologies were observed by the metallurgical microscope, scanning electron microscope, 3D measuring laser microscopy and hardness tester. The interfacial properties of the composites are affected by hot pressing process, which determine the tribological properties of composites. The optimum process parameters can be optimized by response surface methodology with the analysis of the wear mechanism, and the optimum hot pressing process are 19-25MPa,165-174℃,18-22min.

Keywords

• response surface methodology
• friction material
• manufacturing process
• tribological property
• wear mechanism