ZrB2-SiC/Inconel 600钎焊接头界面结构与反应机理  

Interface structure and reaction mechanism of ZrB2-SiC/Inconel 600 brazing joint

作　　者：魏平[1] 蔡颖军 徐锐 王微[1] WEI Ping;CAI Ying-jun;XU Rui;WANG Wei(School of Aviation and Materials,Anhui Technical College of Mechanical and Electrical Engineering,Wuhu 241000,China;School of Mechanical and Automotive Engineering,Anhui Polytechnic University,Wuhu 241000,China)

机构地区：[1]安徽机电职业技术学院航空与材料学院,安徽芜湖241000 [2]安徽工程大学机械与汽车工程学院,安徽芜湖241000

出　　处：《材料热处理学报》2020年第2期159-165,共7页Transactions of Materials and Heat Treatment

基　　金：安徽省教育厅重点项目(KJ2019A1157,KJ2018A0860);2016年国家创新行动发展计划骨干专业建设(XM-1);教育部高等职业教育创新发展行动计划(2015-2018)项目(金属3D打印生产性实训基地)。

摘　　要：采用Ag-28Cu钎料对ZrB2-SiC陶瓷与Inconel 600镍基合金进行真空钎焊连接。利用扫描电镜、能量色散X射线光谱仪研究了钎焊接头界面结构、断口形貌,借助万能试验机测试其剪切强度。结果表明:采用Ag-28Cu钎料对ZrB2-SiC/Inconel 600真空钎焊,可以实现接头冶金结合,接头无裂纹及微孔隙缺陷。界面反应产物为Ni-Fe-Cr合金、Cu(s,s)+Ag(s,s)固溶体、(Cr,Fe)7C3+(Cr,Fe)3C2合金碳化物,结合扩散理论和热力学分析阐述了界面产物形成机理。钎焊接头室温平均剪切强度为32.92 MPa,断裂模式为解理断裂。ZrB2-SiC ceramics were brazed with Inconel 600 nickel base alloy by vacuum brazing with Ag-28 Cu as brazing filler. The interface structure and fracture morphology of brazed joint were studied by means of scanning electron microscopy and energy dispersive X-ray spectrometer, and the shear strength of the brazed joint was measured by universal testing machine. The results show that the metallurgical bonding of the joint can be realized by using Ag-28 Cu filler to braze ZrB2-SiC/Inconel 600 alloy, and there are no cracks and micropore defects in the joint. The interfacial reaction products are Ni-Fe-Cr alloy, Cu(s,s) + Ag(s,s) solid solution and(Cr,Fe)7C3 +(Cr,Fe)3C2 alloy carbides. The formation mechanism of the interface products is described by diffusion theory and thermodynamic analysis. The average shear strength of the brazed joint at room temperature is 32.92 MPa, and the fracture mode is cleavage fracture.

关 键 词：ZrB2-SiC陶瓷 INCONEL 600 界面结构 反应机理 

分 类 号：TG454[金属学及工艺—焊接]