首页|碳化硼陶瓷与高氮钢钎焊接头组织和性能

碳化硼陶瓷与高氮钢钎焊接头组织和性能

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使用 Ag-Cu-Ti 钎料实现了碳化硼(B4C)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B4C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B4C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TiFe2,TiN和CuTi2,B4C陶瓷/高氮钢钎焊接头的最大抗剪强度为54 MPa.
Microstructure and properties of boron carbide ceramic brazed joints with high nitrogen steel
The reliable joining between B4C 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 B4C 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 B4C 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 TiFe2,TiN and CuTi2 exist along steel side.As a result,the maximum shear strength of brazed joint reached 54 MPa,.

Ag-Cu-Ti filler metalB4C ceramichigh nitrogen steelwettabilityshear strength

杨晶、薛鹏、张永锋、房旭、江晨雨、石凯

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北京空间机电研究所,北京,100190

南京理工大学,材料科学与工程学院,南京,210094

杭州华光焊接新材料股份有限公司,杭州,311107

Ag-Cu-Ti钎料 碳化硼陶瓷 高氮钢 润湿铺展性能 抗剪强度

2024

10.12073/j.hjxb.20230601001

焊接学报
中国机械工程学会　中国机械工程学会焊接学会　机械科学研究院哈尔滨焊接研究所

焊接学报

CSTPCD北大核心
影响因子：0.815
ISSN：0253-360X
年,卷(期)：2024.45(5)
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