肖逸锋,周年丰,匡雯慧,吴靓,许艳飞,钱锦文,贺跃辉

• 1: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
• 2:湖南省特种设备检验检测研究院
• 3:中南大学粉末冶金国家重点实验室

摘要(Abstract)：

以WC、TiC以及Fe粉为原料,通过改变WC-TiC钢结硬质合金的硬质相组成,研究合金组织及力学性能的变化特点。采用X射线衍射(XRD)、扫描电镜(SEM)和能量色散谱仪(EDS)等手段对制备的样品进行表征。结果表明,随着TiC/WC摩尔比值σ的增大,合金出现了明显的环形结构,晶粒先细化后粗化。TiC的添加降低了钢结硬质合金的密度和致密度,合金宏观硬度随σ值的增大而增大,当σ>1.2时,硬度值略有下降。合金的抗弯强度随σ值的增大呈先降低后升高再降低的趋势,当σ值在0.8~1.0范围时合金的综合力学性能最佳。

关键词(KeyWords)： WC-TiC钢结硬质合金;摩尔比σ;环形结构;宏观硬度;抗弯强度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51271158);; 湖南省教育厅重点项目(17A204);; 湖南省重点研发计划项目(2015WK3021)

作者(Author): 肖逸锋,周年丰,匡雯慧,吴靓,许艳飞,钱锦文,贺跃辉

DOI: 10.13289/j.issn.1009-6264.2016-X249

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