| ZHONG Li,CHEN Meng-qing,LUO Ming-bao,LIU Li.Wear Mechanism and Properties of Low-resin-based Friction Materials Reinforced by Hybrid Fiber[J],47(3):165-171 |
| Wear Mechanism and Properties of Low-resin-based Friction Materials Reinforced by Hybrid Fiber |
| Received:October 20, 2017 Revised:March 20, 2018 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2018.03.027 |
| KeyWord:hybrid fiber low resin-based friction materials wear mechanism wear resistance |
| Author | Institution |
| ZHONG Li |
School of Mechatronics & Vehicle Engineering, Chongqing Jiaotong University, Chongqing , China |
| CHEN Meng-qing |
School of Mechatronics & Vehicle Engineering, Chongqing Jiaotong University, Chongqing , China |
| LUO Ming-bao |
School of Mechatronics & Vehicle Engineering, Chongqing Jiaotong University, Chongqing , China |
| LIU Li |
School of Mechanical-Electrical Engineering, Chongqing University of Art and Sciences, Chongqing , China |
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| Abstract: |
| The work aims to study properties and wear mechanism of low-resin-based friction materials reinforced by hybrid fiber by applying hot-forming process to prepare resin-based friction materials reinforced by copper fiber, aramid fiber and composite mineral fiber, so as to improve wear resistance of friction materials and reduce brake noise. Formulas of friction materials were designed by performing orthogonal experiment, effects of hybrid fiber on properties of low-resin-based friction materials were investigated in the method of range analysis. Microstructures of worn surface and wear debris on the friction materials were observed with scanning electron microscopy (SEM), and elemental composition of the debris was analyzed with energy dispersive spectrometer (EDS) in order to investigate the wear mechanism. The hybrid fiber reinforced low-resin-based friction material exhibited excellent wear resistance, its Rockwell hardness was ranged from 50 to 80HRM, and shear strength was in appropriate range of 11-16MPa. As resin content increased from 8% to 10%, O content of the wear debris on the hybrid fiber reinforced low-resin-based friction material decreased by 33.7% and Cu content decreased by 20.1%. Butadiene-acrylonitrile rubber powder has the maximum impact on wear rate of friction material; copper fiber has the greatest influence on friction coefficient, and copper fiber would form a layer of “transfer film” on the friction surface in friction process, which generates high heat and alleviates heat fade. The change in phenolic resin content affects wear mechanism of friction materials. Wear mechanism transforms from fatigue wear into abrasive wear as resin content increases. |
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