Kovar与Mo钎焊接头的微观组织与力学性能研究  

Microstructure and Mechanical Properties of Kovar/Mo Brazed Joint

作　　者：赵彤 孙权 莫德锋[1,2] 刘大福 李雪[1,2] 龚海梅 ZHAOTong;SUNQuan;MODefeng;LIUDafu;LIXue;GONGHaimei(Key Laboratory of Infrared Imaging Materials and Detectors,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China;School of Engineering Sciences,University of Chinese Academy of Sciences,Beijing 101408,China)

机构地区：[1]中国科学院上海技术物理研究所红外成像材料与器件重点实验室,上海200083 [2]中国科学院大学工程科学学院,北京101408

出　　处：《热加工工艺》2025年第7期24-29,共6页Hot Working Technology

基　　金：中国科学院重点部署项目(ZDRW-CN-2019-3);中国科学院青年创新促进会项目(2018274)。

摘　　要：采用AgCuInTi钎料分别在750℃和800℃下对Mo与Kovar合金进行了真空钎焊,借助扫描电镜和剪切试验对接头微观组织和力学性能进行了表征与分析,并进一步探究了AgCuInTi钎料的活性连接反应机理。结果表明,在钎焊过程中Ni原子向钎料中溶解扩散的数量远高于Fe、Co原子,与Ti原子生成Ni_(3)Ti金属间化合物分布在钎焊接头中,且随着钎焊温度的升高,Kovar合金中Ni原子溶解得越多,导致接头中的Ni_(3)Ti脆性相增多,接头的剪切强度下降。在750℃钎焊温度下保温10min,钎焊接头剪切强度可达189MPa。AgCuInTi active filler foils were used for brazing Mo and Kovar alloys at 750℃and 800℃,respectively.The microstructure and mechanical properties of the joints were characterized and analyzed by scanning electron microscopy and shear test.The active connection reaction mechanism of AgCuInTi alloy brazing filler metal was further analyzed.The results show that the amount of Ni atoms dissolved and diffused into the brazing seam is much higher than that of Fe and Co atoms during the brazing process,and Ni_(3)Ti intermetallic compounds formed with Ti atoms are distributed in the brazing joint.With the increase of brazing temperature,more Ni atoms in Kovar alloy dissolve,which leads to the rise of the Ni_(3)Ti brittle phase in the joint and the decrease of the shear strength of the joint.The shear strength of the joint brazed at 750℃for 10 min reaches about 189 MPa.

关 键 词：Kovar合金 钼 真空钎焊 微观组织 力学性能 

分 类 号：TG425[金属学及工艺—焊接]