Flexible adhesive tape brazing filler metal and preparation method thereof

Abstract

The invention discloses flexible adhesive tape brazing filler metal. The flexible adhesive tape brazing filler metal comprises a dense metal layer, wherein adhesive layers are arranged at two sides of the dense metal layer; release paper layers are arranged on the adhesive layers. Furthermore, the invention further discloses a preparation method of the flexible adhesive tape brazing filler metal; the method comprises the following steps: uniformly applying one layer of adhesive on each of two sides of the dense metal layer; covering one layer of release paper on each adhesive layer. The dense metal layer is a crystalline or amorphous foil strip material. The flexible adhesive tape brazing filler metal disclosed by the invention does not take metal and alloy powder thereof as raw materials, but takes a crystalline or amorphous metal foil strip material as the raw material; almost all metal and alloy soldering flux thereof can be prepared into the adhesive tape brazing filler metal; the flexible adhesive tape brazing filler metal is convenient to use and low in cost, and the brazing performance is equivalent to performances of pure metal and alloy soldering flux thereof; meanwhile, the preparation method has a simple process flow, does not need expensive equipment and is short in preparation period and low in raw material cost, so that the preparation method is worthy of being widely popularized and applied in the field of brazing.

Description

technical field [0001] The invention belongs to the technical field of brazing material processing, and in particular relates to a flexible adhesive tape brazing material and a preparation method thereof. Background technique [0002] In the field of brazing materials, nickel-based alloys, cobalt-based alloys, manganese-based alloys, and copper-based alloys are important high-temperature brazing materials, but the alloy components often contain chromium, silicon, boron, phosphorus, etc. Elements, so that the plasticity and formability of this type of alloy are extremely poor, and it is difficult to make it into filaments, flakes and other forms. At present, brittle high-temperature solder is usually supplied in the form of powder, paste, paste, etc. However, when brazing special structural parts such as honeycomb and large-area welding surfaces, powder, paste, and paste solders bring inconvenience such as addition, difficulty in controlling the amount of addition, difficult...

AI Technical Summary

Problems solved by technology

[0005] The adhesive tape solder and binder reported in the above patents have the following problems: the adhesive pollutes the environment, the preparation cycle is long, and the process is cumbersome; the adhesive tape needs metal powder, the cost is high, and the metal powder impurities and oxygen content are high; Containing 7-17% organic binder, there is carbon residue after brazing, which affects the quality of the weldment; the adhesive tape is not dense; the adhesive tape is less flexible; the powder adhesive tape is generally thick and difficult to coil; The unevenness of the tape roll will affect the brazing cloth; the poor distribution uniformity of the metal powder in the adhesive tape will affect the uniformity of the weld structure and composition; high manufacturing cost

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