Low-silver brazing filler metal for welding pure silver jewelry and preparation method of low-silver brazing filler metal

• Main Authors: PAN JIANJUN, ZHONG SUJUAN, YU XINQUAN, PAN SHISHI, MA JIA, WANG LUYI, YU QI
• Format: Patent
• Language: Chinese; English
• Published: 13.05.2022
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The invention relates to low-silver brazing filler metal for welding pure silver jewelry and a preparation method of the low-silver brazing filler metal, and belongs to the technical field of silver jewelry welding materials. The low-silver brazing filler metal for pure silver jewelry welding is composed of the following elements of, by mass, 60%-70% of Ag, 6%-15% of Zn, 0.1%-4% of Sn, 0.2%-1.2% of Si, 0.2%-0.8% of Ge, 0.5%-2% of microelements and the balance Cu. The trace element is selected from one or any combination of Ni, Co, Ce, Au, Pt, Pd, Ir and Mo. The melting temperature of the low-silver brazing filler metal for welding the pure silver jewelry is 650-780 DEG C, the brazing temperature is 680-800 DEG C, and the low-silver brazing filler metal for welding the pure silver jewelry has the advantages that the welding temperature is low, the fluidity of brazing filler metal melt is good, and turbulent flow and air holes are not prone to occurring in the welding process, and is suitable for low-temperatur