C、W摩尔比对真空烧结反应合成WC-Fe耐磨材料组织和性能的影响

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英文篇名：Effect of molar ratio of C and W on microstructure and properties of in-situ synthesized WC-Fe wear resistant materials by vacuum sintering 作者：肖逸锋 ; 杨燕 ; 吴靓 ; 许艳飞 ; 钱锦文 ; 李浪浪 ; 贺跃辉 英文作者：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;Engineering Research Center of Complex Tracks Processing Technology and Equipment,Ministry of Education, Xiangtan University;State Key Laboratory of Powder Metallurgy, Central South University; 关键词：钨铁 ; 真空烧结 ; 原位合成 ; WC-Fe耐磨材料 英文关键词：ferrotungsten;;vacuum sintering;;in-situ synthesis;;WC-Fe wear resistant material 中文刊名：ZYXZ 英文刊名：The Chinese Journal of Nonferrous Metals 机构：湘潭大学机械工程学院焊接机器人及应用技术湖南省重点实验室;湘潭大学复杂轨迹加工工艺及装备教育部工程研究中心;中南大学粉末冶金国家重点实验室; 出版日期：2018-07-15 出版单位：中国有色金属学报 年：2018 期：v.28;No.232 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~~ 语种：中文; 页：ZYXZ201807007 页数：7 CN：07 ISSN：43-1238/TG 分类号：58-64

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 η phase 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.

引文

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