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原位自生(Ti,W)C颗粒增强铁基复合材料的组织研究
Microstructure Investigation on In-Situ Synthesis of(Ti,W)C Reinforced Iron-Based Composite
【摘要】 采用中频感应电炉熔炼Fe-W,Fe-Ti和Fe-C合金,通过控制熔炼温度、熔炼时间获得了(Ti,W)C/Fe复合材料,采用扫描电镜分析了复合材料的微观结构,利用X射线分析了相组成.结果表明,提高熔炼温度或延长熔炼时间可保证熔体中(Ti,W)C的充分形成,同时通过适当提高冷却速率可获得(Ti,W)C作为惟一增强相的Fe基复合材料.(Ti,W)C比较均匀地分布在熔体中,减小与熔体间的密度差,因此可获得比较均匀的凝固组织.
【Abstract】 The in-situ synthesis of 10 vol%(TiW)C-Fe composite was investigated by melting the Fe-W,Fe-Ti and Fe-C alloys with melting temperature and time controlled.The microstructure and phase composition were checked by employing SEM and XRD with Cu?Kα radiation.The results showed that(Ti,W)C particles,as the only ones,can form reinforcement when the alloy is melted at higher temperature and/or longer time by properly controlling solidification rate.(Ti,W)C particles are evenly distributed in the matrix due to the lower mismatched densities between(Ti,W)C particles and liquid metal.
【Key words】 iron-based composite; microstructure; carbide; reinforcement; in-situ synthesis;
- 【文献出处】 东北大学学报 ,JOURNAL OF NORTHEASTERN UNIVERSITY , 编辑部邮箱 ,2005年11期
- 【分类号】TB331
- 【被引频次】8
- 【下载频次】301