(合肥工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院， 合肥 230009)
摘 要: 采用電冶熔鑄工藝將廢棄的WC鋼結(jié)硬質(zhì)合金制備成WC/鋼復(fù)合材料， 研究了復(fù)合材料中顯微缺陷的形貌及形成機(jī)理。結(jié)果表明： 電冶熔鑄WC/鋼復(fù)合材料的氣孔及夾雜含量少，可有效解決WC顆粒的偏析。 X射線衍射、 掃描電鏡和透射電鏡分析顯示， WC顆粒和鋼基體界面上發(fā)生了界面反應(yīng)， 生成了高穩(wěn)定性的Fe3W3C界面層。
關(guān)鍵字: 電冶熔鑄； WC；復(fù)合材料； 顯微缺陷； 潤濕
steel matrix composites by electroslag melting and casting
（ College of Materials Science and Engineering，
Hefei University of Technology， Hefei 230009, China）
Abstract: Tungsten carbide particulates reinforced steel matrix composites were fabricated by electroslag melting and casting process by using scrap tungsten carbide steel-bonded cement by powder metallurgy as raw material. Micro defects analysis shows that the tungsten carbide/steel metal matrix composite not only has low content of porosity and nonmetal inclusion, but also can alleviate tungsten carbide particulates aggregation remarkably. During the manufacturing process, the tungsten carbide particulates are partly melted because of high temperature. The melted tungsten carbide can react with the steel matrix at the interface. The reacting production is examined as Fe3W3C by means of X-ray diffraction, scanning electron microscopy and transmission electron microscopy.
Key words: electroslag melting and casting； tungsten carbide； composite； micro defects； wetting
