Microstructure and shear strength of the brazed joint of Ti(C,N)-based cermet to steel
Microstructure and shear strength of the brazed joint of Ti(C,N)-based cermet to steel
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DOI：
10.1007/s12598-010-0013-7
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发表时间：
2010-01
期刊：
影响因子：
8.8
通讯作者：
Dameng Ye;W. Xiong;Xiuhai Zhang;J. Qu;Z. Yao
中科院分区：
文献类型：
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作者：
Dameng Ye;W. Xiong;Xiuhai Zhang;J. Qu;Z. Yao
采用Ag-Cu-Zn-Ni钎料真空钎焊Ti（C，N）基金属陶瓷与钢获得了牢固的连接。研究了钎焊温度、保温时间、钎料厚度等工艺参数对接头剪切强度的影响。采用扫描电子显微镜（SEM）、金相显微镜（OM）、X射线能谱仪（EDS）和X射线衍射仪（XRD）对焊接区的显微组织和钎料的反应产物进行了分析。钎焊温度为870°C，保温时间为15 min，钎料厚度为0.4mm是一组最佳工艺参数，在此工艺参数下，接头的剪切强度达到最大值176.5MPa。显微组织分析结果表明，钎料对Ti（C，N）基金属陶瓷和钢的润湿性良好。在焊接母材和填充金属之间存在互溶层和扩散层。
Firm joins were obtained between Ti(C,N)-based cermet and steel with Ag-Cu-Zn-Ni filler metal by vacuum brazing. The effects of technological parameters such as brazing temperature, holding time, and filler thickness on the shear strength of the joints were investigated. The microstructure of welded area and the reaction products of the filler metal were examined by scanning electron microscopy (SEM), metallographic microscope (OM), energy-dispersive X-ray analysis (EDS), and X-ray diffraction (XRD). The brazing temperature of 870°C, holding time of 15 min, and filler thickness of 0.4 mm are a set of optimum technological parameters, under which the maximum shear strength of the joints, 176.5 MPa, is achieved. The results of microstructure show that the wettability of the filler metal on Ti(C,N)-based cermet and steel is well. A mutual solution layer and a diffusion layer exist between the welding base materials and the filler metal.