Lead-free copper-based amorphous brazing material

Abstract

The invention discloses a lead-free copper-based amorphous brazing material. The lead-free copper-based amorphous brazing material comprises the following components according to the total mass percent of 100%: greater than or equal to 0.02% and less than or equal to 0.06% of P, greater than or equal to 0.02% and less than or equal to 0.06% of Bi, greater than or equal to 4.0% and less than or equal to 6.8% of Sn, greater than or equal to 13.5% and less than or equal to 14.3% of Zn, greater than or equal to 0.15% and less than or equal to 0.22% of Ce, greater than or equal to 71% and less than or equal to 83% of Cu and the balance of impurities. According to the lead-free copper-based amorphous brazing material, the Bi element is specially added and the Cu element is completely removed; a microscopic structure morphology of the lead-free copper-based amorphous brazing material is analyzed, and the tensile strength, the percentage elongation after fracture and the Vickers hardness of the lead-free copper-based amorphous brazing material are tested; a result shows that the Bi element is added so that the tensile strength and the hardness of the lead-free copper-based amorphous brazing material can be remarkably improved and the Bi is added so that a needle-shaped or grain-shaped zinc-enriched phase can be separated out from the brazing material.

Description

technical field [0001] The invention relates to a brazing material, in particular to a lead-free copper-based amorphous soldering material. Background technique [0002] At present, known brazing materials are mainly divided into three types: silver-based, nickel-based, and copper-based. Silver-based brazing material has high silver content, moderate and stable melting point, excellent permeability and fluidity, good strength and toughness after welding, and excellent thermal and electrical conductivity. It has been widely used in the welding of workpieces with small contact surfaces; and its surface color is light after brazing, which can be applied to the processing of silver jewelry, glasses and other industries. Nickel-based brazing materials are used in the welding of high-temperature alloys and stainless steel parts (such as aviation parts, automobile and ship parts, cooking utensils, medical equipment, etc.). The copper-based brazing material is mainly used to repla...

AI Technical Summary

Problems solved by technology

[0003] Due to the existence of P element in the existing copper-based brazing material, the alloy is very brittle, and its strength and toughness are not high, so it cannot be made into strips, which limits its application.