Ti3AlC2构建梯度界面对Cu-20Sn-10Ti合金钎料钎焊金刚石磨粒磨削性能的影响

doi:10.3901/JME.2025.04.156

摘要/Abstract

摘要： 为了研究梯度界面对Cu基钎料钎焊金刚石试样耐磨性和界面结合强度的影响，使用不同Ti₃AlC₂含量的陶瓷颗粒对Cu基钎料进行改性，并进行金刚石磨粒的钎焊。使用电子扫描显微镜和能谱仪对钎焊试样金刚石磨粒的微观形貌和界面结构进行研究。使用高精度摩擦磨损试验仪对钎焊试样的耐磨性进行了研究。最后使用ANSYS有限元分析软件研究单界面层和梯度界面对金刚石磨粒和钎料层应力分布的影响。结果表明，Ti₃AlC₂分解生成TiC，减弱了钎焊材料中活性元素Ti与金刚石磨粒之间的剧烈反应，从而降低了金刚石磨粒的热损伤，而活性较强的Al原子与金刚石磨粒反应生成Al₄C₃界面层。Ti₃AlC₂最佳添加含量为3%时，钎焊试样的耐磨性最佳，磨削系数最低，瓷砖的去除率提高了34%。梯度界面对降低钎料层应力的效果更佳明显。

关键词: Ti₃AlC₂, 耐磨性, 梯度界面, 力学性能, 应力

Abstract: In order to investigate the effect of gradient interface on the grinding performance and interfacial bond strength of Cu-based filler metals brazed diamond specimens, Cu-based brazing materials are modified using ceramic particles with different Ti₃AlC₂ contents and diamond abrasive grits are brazed. The microstructure and interfacial structure of diamond abrasive grains of brazed specimens are evaluated using scanning electron microscope and energy dispersive spectrometer. The wear resistance of the brazed specimens is investigated using a high precision friction wear tester. Finally, the effect of single interface layer and gradient interface on the stress distribution of diamond abrasive grits and filler metals layer is studied using ANSYS finite element analysis software for research. The results indicate that Ti₃AlC₂ decomposed to form TiC, which weakened the violent reaction between the active element Ti and diamond abrasive grits in the filler metals, thus reducing the thermal damage of diamond abrasive grits, while the more active Al atoms reacted with diamond abrasive grits to form Al₄C₃ interfacial layer. The best wear resistance and lowest grinding coefficient of brazed specimens are achieved with the optimal Ti₃AlC₂ addition content of 3%, and the tile removal rate is increased by 34%. The gradient interface is more effective in reducing the stress in the brazing layer.

Key words: Ti₃AlC₂, grinding properties, gradient interface, mechanical properties, stress

中图分类号:

TG425

崔冰, 江涛, 赵卫星, 傅玉灿, 杜全斌. Ti₃AlC₂构建梯度界面对Cu-20Sn-10Ti合金钎料钎焊金刚石磨粒磨削性能的影响[J]. 机械工程学报, 2025, 61(4): 156-166.

CUI Bing, JIANG Tao, ZHAO Weixing, FU Yucan, DU Quanbin. Effect of Ti₃AlC₂ Construction Gradient Interface on Brazing Diamond Abrasive Grains with Cu-20Sn-10Ti Filler Metals[J]. Journal of Mechanical Engineering, 2025, 61(4): 156-166.

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Ti₃AlC₂构建梯度界面对Cu-20Sn-10Ti合金钎料钎焊金刚石磨粒磨削性能的影响

Effect of Ti₃AlC₂ Construction Gradient Interface on Brazing Diamond Abrasive Grains with Cu-20Sn-10Ti Filler Metals

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