CAJ | 학술논문

采用粉末冶金方法制备不同SiC含量的SiC/Fe-3Cu-C-2Ni-1.5Cr-0.5Mo复合材料，采用硬度计、扫描电镜、电子万能试验机、万能摩擦磨损试验机对材料进行测试，研究SiC含量对铁基合金密度、组织结构、力学性能和干摩擦磨损性能的影响规律，并探讨其摩擦磨损机理。结果表明：当SiC的加入量为0.5%~2%(质量分数)时，复合材料的密度和强度均降低，但硬度和耐磨性能显著提高；当SiC加入量达到5%时，复合材料的密度、强度、硬度及耐磨性能均大幅降低。SiC含量为1.5%的复合材料耐磨性能最佳并能保持良好的力学性能，有望在气门导管、传动小齿轮等机械零部件上得到运用。复合材料的磨损机理为粘着磨损和磨粒磨损。
채용분말야금방법제비불동SiC함량적SiC/Fe-3Cu-C-2Ni-1.5Cr-0.5Mo복합재료，채용경도계、소묘전경、전자만능시험궤、만능마찰마손시험궤대재료진행측시，연구SiC함량대철기합금밀도、조직결구、역학성능화간마찰마손성능적영향규률，병탐토기마찰마손궤리。결과표명：당SiC적가입량위0.5%~2%(질량분수)시，복합재료적밀도화강도균강저，단경도화내마성능현저제고；당SiC가입량체도5%시，복합재료적밀도、강도、경도급내마성능균대폭강저。SiC함량위1.5%적복합재료내마성능최가병능보지량호적역학성능，유망재기문도관、전동소치륜등궤계령부건상득도운용。복합재료적마손궤리위점착마손화마립마손。
SiC/Fe-3Cu-C-2Ni-1.5Cr-0.5Mo iron-based composites with different contents of SiC were prepared by powder metallurgy. The density, microstructure, mechanical properties, dry friction and wear performance as well as the wear mechanism of the iron-based composites were studied by hardness tester, SEM, electronic universal testing machine, universal friction and wear testing machine. The results show that with the increase of SiC from 0.5% to 2%(mass fraction), the density and strength of the composites decrease slightly, while hardness and wear resistance increase significantly. When the SiC content reaches 5%, the density, strength, hardness and wear resistance of the composites decrease dramatically. The composite with 1.5% SiC exhibits the best wear resistance and maintains relatively good mechanical properties, which is expected to have potential applications in mechanical components such as valve guide, driving pinion. The wear mechanism of the composite is adhesive wear and abrasive wear.