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钎涂工艺对TC4表面金刚石复合涂层组织与耐磨性能影响
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作者单位:

1.中国机械总院集团郑州机械研究所有限公司 新型钎焊材料与技术国家重点实验室， 河南 郑州 450001;2.中国机械总院集团宁波智能机床研究院有限公司，浙江 宁波 315709;3.北京科技大学，北京 100083

中图分类号:

TG425

基金项目:

中原科技创新领军人才项目（234200510015）


Influence of Brazing Process on the Microstructure and Wear Resistance of Diamond Composite Coating on TC4
Author:
Affiliation:

1.State Key Laboratory of Advanced Brazing Filler Metals and Technology, China Academy of Machinery Zhengzhou Research Institute of Mechanical Engineering Co., Ltd, Zhengzhou 450001, China;2.Ningbo Intelligent Machine Tool Research Institute Co., Ltd. of China National Machinery Institute Group, Ningbo 315709, China;3.University of Science and Technology Beijing, Beijing 100083, China

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    摘要:

    为改善钛合金材料的表面耐磨性能，选用Ti-6Al-4V（TC4）为基体材料，在Al-12Si钎料中加入质量分数分别为20%与10%的金刚石颗粒和CuTi合金粉，通过氩气保护感应钎焊的方法实现了TC4表面金刚石复合耐磨钎涂层的制备。研究了CuTi合金的粒度、钎涂温度和等温反应时间对复合涂层微观组织与耐磨性能的影响。结果表明，复合涂层主要由α-Al、Ti(Al1-xSix)3、CuAl2与金刚石颗粒组成，减小CuTi合金粉的粒度、提高钎涂温度均能够促进其与钎料合金的充分反应。随着温度的升高与保温时间的延长，在α-Al与Ti(Al1-xSix)3晶界处存在的CuAl2相逐渐呈弥散分布，提高了钎涂层合金的硬度；但过长时间的保温，会使CuAl2相开始长大，并相互搭接形成粗大网状结构，导致钎涂层合金脆性显著增加，耐磨性能下降。

    Abstract:

    In order to improve the surface wear resistance of titanium alloys, TC4 (Ti-6Al-4V) was selected as the matrix material, and diamond particles (20%, mass fraction) and CuTi alloy powder (10%, mass fractions) were added to Al-12Si filler metal. The diamond composite wear-resistant brazing coating on TC4 surface was prepared by induction brazing under argon protection. The effects of particle size of CuTi alloy, brazing temperature, and isothermal reaction time on the microstructure and wear resistance of composite coatings were studied. The results indicate that the composite coating is mainly composed of α-Al, Ti(Al1-xSix)3, CuAl2, and diamond particles. Reducing the particle size of CuTi alloy powder and increasing the brazing temperature can promote its full reaction with the brazing alloy. With the increase in temperature and insulation time, the CuAl2 phase at the grain boundary between α-Al and Ti(Al1-xSix)3 gradually disperses, improving the hardness of the brazing alloy coating. However, excessive insulation can cause the CuAl2 phase to start growing and to overlap with each other to form a coarse network structure, resulting in a significant increase in brittleness and a decrease in wear resistance of the brazed coating alloy.

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孙华为,刘攀,张雷,秦建,朱宏涛,井培尧.钎涂工艺对TC4表面金刚石复合涂层组织与耐磨性能影响[J].稀有金属材料与工程,2025,54(2):481~489.[Sun Huawei, Liu Pan, Zhang Lei, Qin Jian, Zhu Hongtao, Jing Peiyao. Influence of Brazing Process on the Microstructure and Wear Resistance of Diamond Composite Coating on TC4[J]. Rare Metal Materials and Engineering,2025,54(2):481~489.]
DOI：10.12442/j. issn.1002-185X.20240426

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  • 收稿日期:2024-07-14
  • 最后修改日期:2024-12-18
  • 录用日期:2024-12-19
  • 在线发布日期: 2025-02-25
  • 出版日期: 2025-02-20

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