TiC金属陶瓷/钢钎焊接头的界面结构和连接强度

Interface structure and bonding strength of brazed joint of TiC cermet/steel

摘要: 采用BAg45CuZn钎料对自蔓延高温合成的TiC金属陶瓷与中碳钢进行了真空钎焊连接,利用扫描电镜、电子探针、X射线衍射等分析手段对接头的界面结构和室温抗剪强度进行了研究。结果表明,利用BAg45CuZn钎料可实现TiC金属陶瓷与中碳钢的连接;接头的界面结构为TiC金属陶瓷/(Cu,Ni)固溶体/Ag基固溶体+Cu基固溶体/(Cu,Ni)固溶体/(Cu,Ni)+(Fe,Ni)/中碳钢;在连接温度为850℃保温10 min的钎焊条件下,接头的抗剪强度可达121 MPa。

Abstract: The vacuum brazing of TiC cermet(synthesized by SHS) to medium carbon steel was carried out with BAg45CuZn brazing filler metal,and the interface structure and shear strength of the joints were also investigated by means of SEM,EPMA and XRD.The experimental results showed that the bonding of TiC cermet to medium steel can be performed with BAg45CuZn filler metal.The interface structure of the joint is TiC cermet/(Cu,Ni)/Ag(s,s)+Cu(s,s)/(Cu,Ni)/(Cu,Ni)+(Fe,Ni)/medium carbon steel.The maximum shear strength of the joint brazed at 850℃ for 10 min is up to 121 MPa at room temperature.