碳化硼陶瓷与高氮钢钎焊接头组织和性能  

Microstructure and properties of boron carbide ceramic brazed joints with high nitrogen steel

作　　者：杨晶[1] 薛鹏[2] 张永锋 房旭 江晨雨 石凯 YANG Jing;XUE Peng;ZHANG Yongfeng;FANG Xu;JIANG Chenyu;SHI Kai(Beijing Institute of Space Mechanics&Electricity,Beijing,100910,China;School of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing,210094,China;Hangzhou Huaguang Advanced Weilding Materials Co.,Ltd,Hangzhou,311107,China)

机构地区：[1]北京空间机电研究所,北京100190 [2]南京理工大学,材料科学与工程学院,南京210094 [3]杭州华光焊接新材料股份有限公司,杭州311107

出　　处：《焊接学报》2024年第5期113-118,共6页Transactions of The China Welding Institution

摘　　要：使用Ag-Cu-Ti钎料实现了碳化硼(B_(4)C)陶瓷与高氮钢之间的可靠钎焊连接,研究了Ti元素含量对Ag-Cu-Ti钎料润湿铺展性能的影响,分析了Ti元素影响钎焊接头界面组织的作用机制,并在室温条件下测试了钎焊接头的抗剪强度.结果表明,当钎料Ag-Cu-Ti钎料中的Ti元素含量为4.5%时,钎料在B_(4)C陶瓷与高氮钢上均表现出良好的润湿性能,铺展形貌良好,铺展面积更大,在钎焊温度910℃,保温时间25 min的焊接条件下,Ti元素含量为4.5%的钎料与B_(4)C陶瓷和高氮钢均实现了良好的冶金结合,显微组织分析结果表明,钎焊接头组织在陶瓷侧反应层存在TiB和TiC,而在高氮钢侧反应层中出现了TiFe_(2),TiN和CuTi_(2),B_(4)C陶瓷/高氮钢钎焊接头的最大抗剪强度为54 MPa.The reliable joining between B_(4)C ceramic and high nitrogen steel was obtained using Ag-Cu-Ti filler metal.The wettability and spreadability of Ag-Cu-Ti filler metal with different Ti contents on B_(4)C ceramics and high nitrogen steel were studied,as well as the microstructure and shear strength of brazed joints were investigated.The results indicated that when the Ti content reaches 4.5wt%,the filler metal possess better wettability and spreadability effect on both B_(4)C ceramics and high nitrogen steel.The result of microstructure analysis indicated that TiC and TiB exist in the microstructure of brazing joints along ceramic side,while TiFe_(2),TiN and CuTi_(2) exist along steel side.As a result,the maximum shear strength of brazed joint reached 54 MPa,.

关 键 词：AG-CU-TI钎料 碳化硼陶瓷 高氮钢 润湿铺展性能 抗剪强度 

分 类 号：TG425[金属学及工艺—焊接]