苏倩,刘成成,罗军明,黄俊

• 1:南昌航空大学材料科学与工程学院

摘要(Abstract)：

利用热力学分析Fe-Ti-B体系反应生成TiB_2的可能性,运用DSC曲线确定原位反应温度,并采用微波烧结技术原位合成TiB_2钢结硬质合金。通过光学显微镜、扫描电镜、能谱分析仪分析微波烧结温度对原位合成TiB_2钢结硬质合金组织的影响,采用显微硬度计和万能试验机对TiB_2钢结硬质合金的显微硬度及抗弯强度进行检测分析。结果表明:Fe-Ti-B体系在637.8℃即可发生原位反应,体系中反应生成物相主要为TiB_2和Fe_2B相。随着烧结温度的升高,硬质合金的密度、显微硬度和抗弯强度均先升高后降低,在1100℃时达到最大值,即相对密度、显微硬度和抗弯强度分别为97.5%、418 HV0.1和647 MPa。

关键词(KeyWords)： 原位反应;钢结硬质合金;微波烧结;TiB2

Abstract:

Keywords:

基金项目(Foundation): 江西省铜钨新材料重点实验室(2011-TW-08);; 江西省科技攻关项目(2011BBE50010)

作者(Author): 苏倩,刘成成,罗军明,黄俊

DOI: 10.13289/j.issn.1009-6264.2016.11.019

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