| Ni-Cr合金钎料激光钎焊金刚石磨粒界面显微结构及形成机理 |
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| 引用本文： | 杨志波,刘爱菊,刘石安,杨瑞云. Ni-Cr合金钎料激光钎焊金刚石磨粒界面显微结构及形成机理[J]. 稀有金属材料与工程, 2016, 45(5): 1152-1156 |
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| 作者姓名： | 杨志波 刘爱菊 刘石安 杨瑞云 |
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| 作者单位： | 河南理工大学 河南 焦作 454000,河南理工大学 河南 焦作 454000,河南理工大学 河南 焦作 454000,河南理工大学 河南 焦作 454000 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 本文采用Ni-Cr合金钎料,在Ar气保护条件下,对金刚石磨粒进行了激光钎焊试验研究。采用扫描电镜(SEM)和能谱仪(EDS)及X射线衍射仪(XRD)分析金刚石磨粒与Ni-Cr钎料结合界面的组织结构与物相组成,并研究了钎料与金刚石界面处碳化物的形成机理。测试结果表明,激光钎焊过程中在金刚石表面附近形成的富Cr层与金刚石表面的C元素反应生成碳化物Cr3C2,通过反应热力学与动力学分析显示界面反应产物可以依靠置换反应形成,使金刚石磨粒与钎料实现了牢固结合。
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| 关 键 词： | 激光钎焊 Ni-Cr合金 界面微结构 反应机理 |
| 收稿时间： | 2015-04-14 |
| 修稿时间： | 2015-10-21 |
The interface microstructure and formation mechanism of diamond abrasives laser brazed with Ni-Cr solders |
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| Zhibo Yang,Aiju Liu,Shian Liu and Ruiyun Yang. The interface microstructure and formation mechanism of diamond abrasives laser brazed with Ni-Cr solders[J]. Rare Metal Materials and Engineering, 2016, 45(5): 1152-1156 |
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| Authors: | Zhibo Yang Aiju Liu Shian Liu Ruiyun Yang |
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| Affiliation: | Henan Polytechnic University,Henan Polytechnic University,Henan Polytechnic University,Henan Polytechnic University |
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| Abstract: | In this paper, the laser brazing of diamond abrasives using Ni-based solders in an Ar atmosphere was investigated. The microstructure and phase composition of interfaces between diamond abrasives and Ni-based solders were analyzed using scanning electronic microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). Meanwhile, the formation mechanism of carbides at interfaces between solders and diamond abrasives was discussed. The results indicate that during laser brazing, the Cr-enriched layer around the diamond surface reacts with the C in the diamond surface and consequently forms Cr3C2. Based on reaction thermodynamics and kinetics analysis, it is revealed that the interface reaction products can be formed via replacement reactions, which realizes the tight combination between diamond abrasives and solders. |
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| Keywords: | laser brazing Ni-based alloy interface microstructure reaction mechanism. |
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