【摘要】 采用制备的一种新型中温铝基钎料箔(熔点513~529℃),在530~550℃对LD2铝合金进行真空钎焊试验。测试钎焊接头的室温抗拉性能,采用扫描电镜(SEM)及能谱仪(DES)对钎焊接头组织和断口形貌进行观察分析。试验结果表明,制备的钎料可用于LD2铝合金的真空钎焊,在优化工艺规范下可获得致密的接头,焊后经热处理,钎焊接头平均室温抗拉强度可达300MPa,断口是以典型韧窝为特征的塑性断口。更多还原

【Abstract】 LD2 aluminum alloy was vacuum brazed at 530~550℃ using a new low-melting point(513~529℃) aluminum-base filler.The tensile strength of the joint were measured at room temperature and the fracture morphology and microstructure of the joint were examined using SEM and EDS.The results showed that sound joint could be obtained using the new low-melting point aluminum-based filler at optimum parameters with average room temperature tensile strength over 300MPa,and fracture morphology showed the characteristics of typical ductile fracture with dimples.更多还原