摘要
采用中频感应熔炼炉熔炼制备了碳含量0.48%、铬含量12.58%、硼含量1.48%的Fe-Cr-B-C合金材料,利用金相显微镜、扫描电镜、能谱分析和X射线衍射仪对该合金的微观组织和物相组成进行了研究,采用第一性原理计算研究了硼化物硬质相的力学模量和硬度。结果表明,Fe-Cr-B-C合金的硬质相种类主要为Fe_2B和Fe_3B型,其形貌为连续的网络状共晶组织结构,Fe_2B的力学模量和硬度要高于Fe_3B,并且Cr元素的加入能够进一步提高Fe_2B和Fe_3B的力学模量和硬度。
The Fe-Cr-B-C alloy with 0.48% C, 12.58% Cr, 1.48% B, was prepared by medium frequency induction melting furnace. The microstructure and phase composition were studied by means ofmetallographic microscopy, scanning electron microscopy, energy spectrum analysis and X-ray diffraction. The mechanical modulus and hardness of borides hard phase were investigated by the first-principles calculations. The results show that the type of hard phases in Fe-Cr-B-C alloys is Fe2B and Fe3B, and their morphology is the continuous network. The mechanical modulus and hardness of Fe2B are higher than Fe3B. The addition of chromium can improve the mechanical modulus and hardness of Fe2B and Fe3B.
出处
《铸造》
CAS
CSCD
北大核心
2016年第10期1000-1002,1006,共4页
Foundry
