Self-fluxing silver solder containing Yb, Ge and nano Nb

Abstract

The invention discloses self-fluxing silver solder containing Yb, Ge and nano Nb and belongs to the field of metal connection materials. The self-fluxing silver solder, namely an interconnection material, comprises 45.0% to 62.0% of Ag, 9% to 13% of Zn, 1% to 5% of Li, 0.001% to 0.03% of Yb, 0.001% to 0.02% of Ge, 0.01% to 0.5% of nano Nb and the balance Cu. According to the self-fluxing silver solder containing Yb, Ge and nano Nb, the coupling function of rare earth Yb, Ge and nano Nb is used for modifying the performance of the Ag-Cu-Zn-Li solder, and accordingly the self-fluxing property and the wettability of the solder and the mechanical performance of soldered joints are remarkably improved. The self-fluxing silver solder is particularly applicable to soldering of tiny contacts of pipe fittings, tools, motors, electric appliances and the like, and soldering flux is not needed.

Description

technical field [0001] The invention relates to a self-brazing silver solder containing Yb, Ge and nanometer Nb, which belongs to the field of metal connecting materials. This connecting material is mainly suitable for the welding of small contacts such as pipe fittings, tools, motors, and electrical appliances. No need to use flux, and has "self-brazing performance". Compared with the traditional high-silver solder containing 65% silver, it has good wettability and mechanical properties. Background technique [0002] In the motor manufacturing industry, the brazing seam of the motor coil is mainly welded with high-silver AgCuZn solder containing 65% silver, but with the gradual increase in the amount of silver solder, high-silver undoubtedly increases the cost burden. In addition, obvious slag is found in the brazing seam, which obviously reduces the strength and toughness of the brazing seam. For some workpieces that need to withstand multiple vibration loads and the we...

AI Technical Summary

Problems solved by technology

[0002] In the motor manufacturing industry, the brazing seam of the motor coil is mainly welded with high-silver AgCuZn solder containing 65% silver, but with the gradual increase in the amount of silver solder, high-silver undoubtedly increases the cost burden

In addition, obvious slag is found in the brazing joint, which obviously reduces the strength and toughness of the brazing joint

For some workpieces that need to withstand multiple vibration loads and the welding of Ag / Cu, AgW and other electrical contacts, it is difficult to clean up the residue after brazing, which undoubtedly brings safety hazards to the entire structural parts