【摘要】 采用研制的CuMn基钎料对TZM与Kovar合金进行了高频真空钎焊研究。利用DTA、氦质谱捡漏仪、激光共聚焦显微镜、SEM、EDS等分析手段,测试了钎料的熔点、对TZM与Kovar合金润湿性,分析了钎缝的气密性、微观组织形貌、界面组织成分等。结果表明:在965℃时,CuMn基钎料在TZM与Kovar合金样品上的润湿角θ分别为30.77°和12.30°。在最大钎焊感应电流为430 A时,焊料对钎缝铺展均匀,钎缝区域无裂纹、无气泡等缺陷,焊件气密性测试漏气率优于6×10^-11Pa·m³/s。钎缝中间层区域为CuMn基钎料凝固组织,钎料与TZM反应界面区域较窄,与Kovar合金的界面反应区域较宽。钎料中的Mn、Cu元素与Kovar合金中的Fe元素更容易相互扩散迁移发生冶金熔合反应。更多还原

【Abstract】 The CuMn-based filler metal was used to braze TZM and Kovar alloys. The melting point and wettability of the solder to TZM and Kovar alloys were tested and the gas tightness, microstructure, interfacial structure, and composition of the welds were also tested by DTA, helium mass spectrometer, laser confocal microscope, SEM and EDS. The results show that the wetting angle of Cu-Mn based filler metal on TZM and Kovar alloy sample is 30.77° and 12.30°, respectively at 965 °C. When the largest induced current is 430 A, the filler metal spreads evenly on the weld and there is no crack and defects such as bubbles at the weld areas. The leakage rate test of welding are better than 6×10^-11Pa·m³/s. The middle area of the weld is CuMn metallurgical solidification structure, reaction interface area between solder with TZM is relatively narrow than that with Kovar alloy. Mn and Cu in the filler metal and Fe in Kovar alloy are more likely to diffuse and migrate to each other to form the metallurgical fusion reaction.更多还原