采用粉末冶金技术设计制备了质量分数4%TiC强化的FeCrB基抗磨复合材料,与GCr15钢球配副进行往复式干摩擦实验,系统研究滑动速度和载荷对复合材料的干摩擦磨损性能的影响。使用X射线衍射(X-Ray Diffraction,XRD)、扫描电子显微镜(Scannin...采用粉末冶金技术设计制备了质量分数4%TiC强化的FeCrB基抗磨复合材料,与GCr15钢球配副进行往复式干摩擦实验,系统研究滑动速度和载荷对复合材料的干摩擦磨损性能的影响。使用X射线衍射(X-Ray Diffraction,XRD)、扫描电子显微镜(Scanning Electron Microscope,SEM)等技术分析了复合材料的物相成分和微观形貌。实验结果表明:复合材料物相为α-Fe、FeCr、TiC、Cr_(2)B和Fe_(2)B相。TiC的加入显著提高了材料的硬度,密度略有下降。随着滑动速度和载荷的增大,摩擦因数总体下降而磨损率显著增加。TiC对铁基体的钉扎作用抑制了材料的剥落和变形,材料的抗磨性能显著提高。综合分析,TiC能有效提升FeCrB合金的干摩擦学性能,其磨损机制主要是剥层磨损和磨粒磨损。展开更多
To verify the effect of Al_2O_3 particle content and size as an abrasive on resin matrix friction materials for mining equipment, the tribological performance of friction materials was studied by using a blockon-ring ...To verify the effect of Al_2O_3 particle content and size as an abrasive on resin matrix friction materials for mining equipment, the tribological performance of friction materials was studied by using a blockon-ring tribotester over a wide range of applied load and sliding speed. The testing conditions simulated brake conditions of mining equipment. The antiwear property of nano-Al_2O_3 was superior to that of micro-Al_2O_3 for friction materials. The friction coefficients of specimens increased with the increase of nano-Al_2O_3 content. The wear rates decreased with increasing nano-Al_2O_3 content. The wear rates of specimens containing nano-Al_2O_3 was about 2-8 times lower than that of specimen with micro-Al2O3. The specimen with 10.5 vol% nano-Al_2O_3 showed the best tribological properties. The wear mechanism of specimens with nano-Al_2O_3 was abrasive wear and plastic deformation.展开更多
文摘采用粉末冶金技术设计制备了质量分数4%TiC强化的FeCrB基抗磨复合材料,与GCr15钢球配副进行往复式干摩擦实验,系统研究滑动速度和载荷对复合材料的干摩擦磨损性能的影响。使用X射线衍射(X-Ray Diffraction,XRD)、扫描电子显微镜(Scanning Electron Microscope,SEM)等技术分析了复合材料的物相成分和微观形貌。实验结果表明:复合材料物相为α-Fe、FeCr、TiC、Cr_(2)B和Fe_(2)B相。TiC的加入显著提高了材料的硬度,密度略有下降。随着滑动速度和载荷的增大,摩擦因数总体下降而磨损率显著增加。TiC对铁基体的钉扎作用抑制了材料的剥落和变形,材料的抗磨性能显著提高。综合分析,TiC能有效提升FeCrB合金的干摩擦学性能,其磨损机制主要是剥层磨损和磨粒磨损。
基金Funded by the National Natural Science Foundation of China(No.51405329)the China Postdoctoral Science Foundation(No.2015M570239)
文摘To verify the effect of Al_2O_3 particle content and size as an abrasive on resin matrix friction materials for mining equipment, the tribological performance of friction materials was studied by using a blockon-ring tribotester over a wide range of applied load and sliding speed. The testing conditions simulated brake conditions of mining equipment. The antiwear property of nano-Al_2O_3 was superior to that of micro-Al_2O_3 for friction materials. The friction coefficients of specimens increased with the increase of nano-Al_2O_3 content. The wear rates decreased with increasing nano-Al_2O_3 content. The wear rates of specimens containing nano-Al_2O_3 was about 2-8 times lower than that of specimen with micro-Al2O3. The specimen with 10.5 vol% nano-Al_2O_3 showed the best tribological properties. The wear mechanism of specimens with nano-Al_2O_3 was abrasive wear and plastic deformation.
