摘要
采用X射线衍射分析WC-Co硬质合金的Co相结构时,WC相对Co相的衍射峰有强烈的掩盖作用,因此本文采取先经电解腐蚀去除合金表面适量的WC后再用X射线衍射,分析常见牌号硬质合金的Co相组成。结果表明:电解腐蚀可以有效地去除硬质合金表面的WC晶粒,从而减少X射线衍射时WC相对Co相衍射峰的掩盖作用;与相关文献报道不同,常见牌号硬质合金的Co相结构基本上全部为面心立方结构;常规的金相样品制备过程会引起Co相晶型结构由fcc结构向hcp结构转变。
While analyzing cobalt phase structure of cemented carbide by XRD,WC phase exerts a strong cover effect on cobalt phase.Therefore a mixed process of electrolysis corrosion and XRD was used to analyze the cobalt phase structure in cemented carbide.The results show that： the electrolysis corrosion can effectively remove WC grains on the surface of cemented carbide,which can reduce WC phase＇s cover effect on cobalt phase for XRD analysis;the cobalt phase in cemented carbide is almost of fcc type,which is different from what related references reported;The normal preparation of metallography samples brings about to the crystal transition of cobalt phase from fcc to hcp.
出处
《粉末冶金材料科学与工程》
EI
2010年第6期611-614,共4页
Materials Science and Engineering of Powder Metallurgy
基金
国家科技重大专项(20092X04012-032)
