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以钢纤维为增强材料,采用氮气保护烧结方法制备出了钢纤维增强陶瓷基摩擦材料,用XD-MSM型定速摩擦磨损试验机对比研究了不同钢纤维含量对陶瓷基摩擦材料的热衰退性能、恢复性能以及磨损性能的影响,利用扫描电子显微镜(SEM)观察磨损表面形貌,并探讨了其磨损机理.研究结果表明:钢纤维的添加量(质量百分数)为24%时,钢纤维同陶瓷基体界面结合良好,陶瓷基摩擦材料的耐磨性能有所提高,热衰退率仅为5.8%,恢复率达到了107.8%,表明此配方陶瓷基摩擦材料具有较高的抗热衰退性能和恢复性能;钢纤维的含量影响陶瓷基摩擦材料的磨损形式,当含钢纤维含量较少时,陶瓷基摩擦材料以脆性脱落和疲劳磨损混合磨损形式为主;而随添加钢纤维含量的增多,其磨损形式转变为磨粒磨损;钢纤维过量加入时,则主要磨损形式为脆性脱落和疲劳磨损,并伴有黏着磨损.
The steel fiber reinforced ceramic-based friction material was prepared by nitrogen protection sintering method with steel fiber as the reinforcing material. The thermal degradation performance of ceramic-based friction material with different steel fiber content was compared with XD-MSM constant speed friction and wear tester , The recovery performance and the wear performance of the steel fiber were studied.The scanning electron microscopy (SEM) was used to observe the wear surface morphology and the wear mechanism was discussed.The results show that when the steel fiber content (mass percentage) is 24% The ceramic substrate interface is well bonded and the abrasion resistance of the ceramic-based friction material is improved. The thermal decay rate is only 5.8% and the recovery rate is 107.8%, indicating that the ceramic-based friction material has high resistance to heat decay and recovery The content of steel fiber affects the wear form of ceramic-based friction material. When the content of steel fiber is small, the ceramic-based friction material is in the form of mixed wear with brittleness and fatigue wear. With the increase of steel fiber content, Abrasive form changes to abrasive wear; When excessive steel fiber is added, the main wear forms are brittle shedding and fatigue wear, accompanied by adhesive wear.