| Cr与金刚石界面碳化物形成机理研究 |
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| 引用本文： | 邵浩明,;王进保,;李东平.Cr与金刚石界面碳化物形成机理研究[J].珠宝科技,2008(1):19-21. |
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| 作者姓名： | 邵浩明 ;王进保 ;李东平 |
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| 作者单位： | [1]国家特种矿物材料工程技术研究中心,广西桂林541004; [2]桂林矿产地质研究院,广西桂林541004 |
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| 基金项目： | 广西壮族自治区科技厅应用基础研究专项资助项目（桂科基0731006） |
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| 摘 要： | 选用含Cr活性钎料，适当控制钎焊工艺，实现了金刚石与基体的高强度连接。采用扫描电子显微镜（SEM）和能谱仪（EDS）及X射线衍射结构（XRD）分析了真空加热条件下，含铬活性钎料与金刚石之间的界面反应以及界面反应产物，探讨了钎料与金刚石界面处碳化物的形成机理。分析结果表明，活性钎料中的Cr在金刚石表面富集并与金刚石中的C生成枝状的碳化物，既实现了化学冶金结合，生成的碳化物呈枝状，也进一步加强了对金刚石的把持作用。
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| 关 键 词： | 金刚石 钎焊 枝状碳化物 化学冶金结合 |
Research on formation mechanism of carbonide transition layer at the diamond interface with Cr |
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| Affiliation: | SHAO Hao-ming, WANG Jin-bao, LI Dong-ping (1. National Special Mineral Materials Engineering Research Center, Guilin, Guangxi 541004 ,China ; 2. Guilin Research Institute of Geology for Mineral Resources,Guilin,Guangxi 541004, China) |
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| Abstract: | The high strength bonding between diamond grit and base steel was realized by using a Cr-based active brazing filler metal under controlled brazing conditions. The interface between the Cr-based filler metal and diamond grit was analyzed by using scanning electronic microscope, energy dispersive X-ray spectroscopy and X-ray diffraction. The formation mechanism of carbide layers was discussed. Testing results show that the Cr element in the filler metal is accumulated onto diamond surface and reacts with C element to form ramiform carbide. As a result, metallurgical bonding is produced between the filler metal and the diamond grit. The form of ramiform carbide also strengthens the bonding strength between the base steel and diamond. |
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| Keywords: | diamond brazing ramiform carbide metallurgical bond |
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