Copper-based amorphous brazing material and preparation method thereof, as well as strip and preparation method thereof

Abstract

The invention discloses a copper-based amorphous brazing material and a preparation method thereof, as well as a strip and a preparation method thereof. The copper-based amorphous brazing material doesn't contain a P element and a B element, but comprises Cu, Si, Sn, Ni and at least one IVB group element in Ti, Zr and Hf. The weight ratio of Cu, Si, Sn and at least one IVB group metal in Ti, Zr and Hf is (71-83):(0.15-0.22):(4.0-6.8):(13.5-14.3):(0.02-0.06). The copper-based amorphous brazing material and the preparation method thereof, as well as the strip and the preparation method thereof have the advantages as follows: 1), the P element is removed, so that the toughness of the brazing material is greatly improved; and 2), a micro amount of one or combinations of three IBV group elements, namely Ti, Zr and Hf is or are added, so that the brazing temperature is not increased, and the brazing strength is improved and a mechanical property of a brazing joint is guaranteed at the same time. The invention further discloses the preparation method of the copper-based amorphous brazing material, the copper-based amorphous brazing material strip made of the copper-based amorphous brazing material and the preparation method of the copper-based amorphous brazing material strip.

Description

technical field [0001] The invention relates to a brazing material and a preparation method thereof, in particular to a copper-based amorphous brazing material, a method for preparing the copper-based amorphous brazing material, and a copper-based amorphous brazing material made of the copper-based amorphous brazing material. The invention discloses an amorphous brazing material strip and a preparation method of the copper-based amorphous brazing material strip. 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...

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.