填充泡沫Ti/AlSiMg复合钎料的70% SiCp/Al复合材料钎焊接头组织性能研究

doi:10.3901/JME.2023.14.092

机械工程学报 ›› 2023, Vol. 59 ›› Issue (14): 92-105.doi: 10.3901/JME.2023.14.092

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填充泡沫Ti/AlSiMg复合钎料的70% SiC_p/Al复合材料钎焊接头组织性能研究

李娟^1,2,3, 常子恒¹, 赵宏龙¹, 李立新², 张英哲¹, 涂泉², 秦庆东¹, 何鹏³

1. 贵州理工学院贵州省轻金属材料制备技术重点实验室贵阳 550003;
2. 中国航发贵州黎阳航空动力有限公司贵阳 550014;
3. 哈尔滨工业大学先进焊接与连接国家重点实验室哈尔滨 150001

收稿日期:2022-01-15 修回日期:2022-11-13 出版日期:2023-07-20 发布日期:2023-08-16
通讯作者: 秦庆东(通信作者),男,1978年出生,教授。主要研究方向为金属材料的焊接。E-mail:20140441@git.edu.cn
作者简介:李娟,1990年出生,讲师。主要研究方向为新材料、复合材料、异种材料连接。E-mail:lijuanaishenghuo@163.com;赵宏龙,1992年出生,讲师。主要研究方向为高熵合金的焊接。E-mail:20201015@git.edu.cn
基金资助:
国家自然科学基金(51964011)、贵州省科技计划(黔科合基础[2020]1Y235)、贵州省教育厅青年科技人才成长(黔教合KY字[2018]245)、贵州理工学院学术新苗培养及创新探索专项(GZLGXM-13)和贵州理工学院高层次人才科研启动(XJGC20190916)资助项目。

Study on the Microstructures and Properties of 70% SiC_p/Al Composites Joints Brazed with Titanium Foam/AlSiMg Composite Filler Metal

LI Juan^1,2,3, CHANG Ziheng¹, ZHAO Honglong¹, LI Lixin², ZHANG Yingzhe¹, TU Quan², QIN Qingdong¹, HE Peng³

1. Key Laboratory of Light Metal Materials Processing Technology of Guizhou Province, Guizhou Institute of Technology, Guiyang 550003;
2. AECC Guizhou Liyang Aero-Engine Co., Ltd., Guiyang 550014;
3. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001

Received:2022-01-15 Revised:2022-11-13 Online:2023-07-20 Published:2023-08-16

摘要/Abstract

摘要： 针对高体积分数SiC_p/Al复合材料加工性差的问题，填充泡沫Ti/AlSiMg复合钎料对70% SiC_p/Al复合材料进行了钎焊，探索了钎焊温度、保温时间和焊接压力对接头组织和性能的影响。在700 ℃、60 min和10 MPa条件下钎焊所得接头剪切强度最高，其值为119 MPa，断裂发生在复合材料上，断口中大量的韧窝显示出韧性断裂特征。研究结果表明，温度不低于650 ℃时可获得Ti₇Al₅Si₁₂界面层及其原位增强的钎缝。保温时间对接头组织结构具有一定的影响，在700 ℃下焊接且保温时间不少于60 min时，界面处优先生成连续的Ti₇Al₅Si₁₂化合物界面层，再生成Ti(Al,Si)₃化合物，随着时间的延长，Ti₇Al₅Si₁₂化合物有破碎、疏松的倾向，保温时间为60 min时所得接头剪切强度最高，其接头组织结构为“复合材料/Ti₇Al₅Si₁₂/混合层/Ti₇Al₅Si₁₂/复合材料”。焊接压力不影响接头组织结构，但会影响界面层厚度、致密度和界面结合力，在保证工件完整的条件下提高压力有利于提高接头力学性能。

关键词: 钎焊, 复合材料, 泡沫钛, 界面组织, 力学性能

Abstract: Aiming at the poor processability of the high-volume SiC_p/Al composites, the brazing of 70% SiC_p/Al composites with Ti foam/AlSiMg composite filler metal has been studied. The effects of brazing temperature, holding time and welding pressure on the microstructures and properties are investigated. The results show that the joint having the maximum shear strength of 119 MPa is brazed at 700 ℃, 60 min and 10 MPa. The fracture occurs on the composites, and there are a large number of dimples in the fracture surface which shows the characteristics of ductile fracture. Ti₇Al₅Si₁₂ can generate at not less than 650 ℃. The holding time has a certain influence on the joints’ microstructure. Ti₇Al₅Si₁₂ preferentially forms at the interface, and then Ti(Al, Si)₃ generates. Ti₇Al₅Si₁₂ tends to be broken and loose with the continuation of the insulation process. The joint kept for 60 min at 700 ℃ has the maximum shear strength, whose interface structure is “Composite/Ti₇Al₅Si₁₂/mixed layer/Ti₇Al₅Si₁₂/Composite”. The brazing pressure does not affect the microstructure of the joints, but it affects thickness, density and bonding strength. It can improve the mechanical properties of the joints by increasing the pressure under the condition of ensuring the integrity of the workpieces.

Key words: brazing, composites, titanium foam, interfacial microstructure, mechanical property

中图分类号:

TG425

李娟, 常子恒, 赵宏龙, 李立新, 张英哲, 涂泉, 秦庆东, 何鹏. 填充泡沫Ti/AlSiMg复合钎料的70% SiC_p/Al复合材料钎焊接头组织性能研究[J]. 机械工程学报, 2023, 59(14): 92-105.

LI Juan, CHANG Ziheng, ZHAO Honglong, LI Lixin, ZHANG Yingzhe, TU Quan, QIN Qingdong, HE Peng. Study on the Microstructures and Properties of 70% SiC_p/Al Composites Joints Brazed with Titanium Foam/AlSiMg Composite Filler Metal[J]. Journal of Mechanical Engineering, 2023, 59(14): 92-105.

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填充泡沫Ti/AlSiMg复合钎料的70% SiC_p/Al复合材料钎焊接头组织性能研究

Study on the Microstructures and Properties of 70% SiC_p/Al Composites Joints Brazed with Titanium Foam/AlSiMg Composite Filler Metal

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填充泡沫Ti/AlSiMg复合钎料的70% SiCp/Al复合材料钎焊接头组织性能研究

Study on the Microstructures and Properties of 70% SiCp/Al Composites Joints Brazed with Titanium Foam/AlSiMg Composite Filler Metal

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填充泡沫Ti/AlSiMg复合钎料的70% SiC_p/Al复合材料钎焊接头组织性能研究

Study on the Microstructures and Properties of 70% SiC_p/Al Composites Joints Brazed with Titanium Foam/AlSiMg Composite Filler Metal