摘要
以钨铁和炭黑为反应源,采用真空烧结法反应制备不同n(C)/n(W)的WC-Fe耐磨材料。采用XRD、SEM、EDS、宏观硬度与磨粒磨损等测试技术,对比研究n(C)/n(W)对WC-Fe耐磨材料组织与性能的影响。结果表明:正常WC+γ两相组织对应的n(C)/n(W)范围为1.1～1.3,n(C)/n(W)低于1.1时,出现η相;而n(C)/n(W)高于1.3时,出现C相。随着n(C)/n(W)在0.9～1.7之间增加,硬质WC的含量与平均晶粒尺寸先显著增加后缓慢变化,材料的密度、线收缩率与硬度逐渐下降,磨损质量损失不断增加。
The in-situ synthesized WC-Fe wear resistant materials with different molar ratios of C to W were prepared by vacuum sintering using ferrotungsten and carbon black as reaction source. The effects of molar ratios of C and W on microstructure and properties were studied by XRD, SEM, EDS, macro-hardness tester and abrasive wear testing technology. The results show that when the molar ratios of C to W of the materials varies from 1.1 to 1.3, the materials have a normal two-phase structure. The molar ratios of C to W of the materials is lower than 1.1, the ηphase appears, as when molar ratios of C to W is higher than 1.3, the C phase appears. The content and the average grain size of hard WC observably increase and then change slowly with molar ratios of C and W increase. The density, linear shrinkage and hardness of the material gradually decrease with molar ratios of C and W increase. And the wear mass loss constantly increases with increasing molar ratios of C to W.
作者
肖逸锋
杨燕
吴靓
许艳飞
钱锦文
李浪浪
贺跃辉
XIAO Yi-feng;YANG Yan;WU Liang;XU Yan-fei;QIAN Jin-wen;LI Lang-lang;HE Yue-hui(Key Laboratory of Welding Robot and Application Technology of Hunan Province,School of Mechanical Engineering,Xiangtan University,Xiangtan 411105,China;Engineering Research Center of Complex Tracks Processing Technology and Equipment,Ministry of Education,Xiangtan University,Xiangtan 411105,China;State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2018年第7期1328-1334,共7页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(51271158)
湖南省教育厅重点项目(17A204)
湖南省大学生创新性实验计划项目~~
关键词
钨铁
真空烧结
原位合成
WC-Fe耐磨材料
ferrotungsten
vacuum sintering
in-situ synthesis
WC-Fe wear resistant material
