High-strength silver-free copper-based brazing filler metal

Abstract

The invention discloses a high-strength silver-free copper-based brazing filler metal which is composed of P, Sn, Ni and Cu. The high-strength silver-free copper-based brazing filler metal is low in cost, safe, environmentally friendly and good in welding effect; through the adding of Sn and Ni, the melting point of brazing filler metal alloy is reduced, and the tensile strength and wettability of the brazing filler metal alloy are enhanced.

Description

Technical field [0001] The invention relates to a solder, in particular to a high-strength silver-free copper-based solder. Background technique [0002] The application involving welding between dissimilar metals such as copper, stainless steel, stainless iron, copper alloys, etc. is very wide, and the brazing of these metals generally requires Ag-based or Ag-containing copper-based solders, and even some manufacturers use cadmium-containing silver Only the base solder can obtain an ideal brazing effect. However, Ag is a precious metal, which increases the cost of enterprises and wastes the country's scarce resources. In addition, cadmium-containing solders are seriously polluting the environment and toxic to the human body, which severely limits the application of brazing technology in these fields. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a high-strength silver-free copper-based solder with low cost, safety an...

AI Technical Summary

Problems solved by technology

However, Ag is a precious metal, which increases the cost of the enterprise and wastes the country's scarce resources. Moreover, the cadmium-containing brazing filler metals cause serious environmental pollution and are toxic to the human body, which severely limits the application of brazing technology in these fields.