WC增强Fe-2Cu-2Ni-1Mo-1C粉末冶金钢的制备及其耐磨性能研究  

Study on Manufacturing and Wear Resistance of WC Reinforced Fe-2Cu-2Ni-1Mo-1C Powder Metallurgy Steel

作　　者：李小强[1] 陈火金[1] 李子阳[1] 屈盛官[1] 赖燕根[1] 

机构地区：[1]华南理工大学国家金属材料近净成形工程技术研究中心,广州510640

出　　处：《机械工程学报》2013年第18期57-62,共6页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51174095);中央高校基本科研业务费专项资金(2012ZG0006);新世纪优秀人才支持计划(NCET-10-0364);装备预研教育部支撑技术(62501036011)资助项目

摘　　要：为了提高铁基复合材料的耐磨性能,采用高能球磨和放电等离子烧结技术制备WC颗粒增强Fe-2Cu-2Ni-1Mo-1C粉末冶金钢,并运用X射线衍射仪、金相、扫描电子显微镜等分析烧结试样的相组成、显微组织以及磨损后的表面形貌,进而研究烧结试样的磨损性能和磨损机制。结果表明,烧结试样的显微组织主要由珠光体、奥氏体和WC组成,并且随着WC添加量的增加,烧结试样的组织中的奥氏体质量分数也相应增加而珠光体的质量分数相应减少;烧结试样的平均摩擦因数和磨损量都随着WC质量分数增加呈现先减小后增大的趋势,当WC质量分数为15%时,烧结试样具有较好的耐磨性能,其密度和硬度分别为8.46 g/cm3和58.2 HRC,与不含WC的试样相比,其平均摩擦因数和磨损量分别降低18%和97%,相应的磨损机制主要为磨粒磨损,并辅以黏着磨损。In order to improve the wear resistance of iron base composite materials, WCp reinforced Fe-2Cu-2Ni-IMo-IC powder metallurgy steels are prepared by high energy milling and spark plasma sintering. The phase composition, microstructure and wear surface morphology of the sintered specimens are analyzed by using X-ray diffraction（XRD）, optical microscope（OM）, scanning electron microscope（SEM）, etc. Also, the wear performance and wear mechanism of the sintered specimens are studied. The results indicate that the microstructure of the sintered specimens mainly consists ofpearlite, austenite and WC particles. With the increase of WC content, the austenite content also increases in the microstructure of the sintered specimen and the pearlite content decreases. Both the average friction coefficient and abrasion loss of the specimens decrease with the increase of WCp content, but an excess of WCp additive is not beneficial to them. The specimen containing 15% WC additive shows a better wear resistance property, with density of 8.46 g/cm3 and hardness of 58.2 HRC. The average friction coefficient and abrasion loss of the specimen is reduced by 18% and 97% respectively, in contrast to that of the specimens without WC particles. The main wear mechanism is adhesive wear, accompanying abrasive wear.

关 键 词：高能球磨 放电等离子烧结 粉末冶金钢 WC颗粒增强 耐磨性能 

分 类 号：TF124[冶金工程—粉末冶金]