Preparation method of metal matrix composite conductor blank

Abstract

The invention discloses a preparation method of a metal matrix composite conductor blank. The method comprises the following steps of firstly, processing a metal material A into a core rod, processinga metal material B into an outer cylinder, and inserting the core rod into the outer cylinder to obtain a metal rod; secondly, performing plugging welding on the metal rod to obtain a blank; thirdly,heating the blank, and carrying out hot extrusion; and fourthly, sawing the blank subjected to hot extrusion to obtain the metal matrix composite conductor blank. According to the preparation methodof the metal matrix composite conductor blank in the invention, two metal materials are respectively processed into the core rod and the outer cylinder with the same taper angle, then the core rod andthe outer cylinder are prepared into the blank, and the blank is subjected to hot extrusion treatment and sawing treatment, so that the effective contact surface between the metal materials is increased, the fluidity difference of the blank in the hot extrusion process is improved, the phenomenon that the core rod material at the tail end of the blank is insufficient in the hot extrusion processis effectively improved, the yield of the metal matrix composite conductor blank is improved, and the production cost of the metal matrix composite conductor blank is reduced.

Description

technical field [0001] The invention belongs to the technical field of material processing and molding, and in particular relates to a method for preparing a metal matrix composite wire blank. Background technique [0002] In aerospace, machinery, chemical industry, metallurgy and other industrial manufacturing, the metal matrix composite wire structure formed between stainless steel and copper or copper alloy and other different metal materials is common. It is a combination of two metal materials with different properties. The new type of wire made has superior performance that cannot be achieved by a single material. Such a composite structure can not only save a large amount of non-ferrous metals, but also significantly reduce production costs. The metal matrix composite wire was invented in Germany in the 1930s, and then in Developed countries such as the United States, Britain, and France have promoted and widely used in the fields of high-frequency signal transmission...

AI Technical Summary

Problems solved by technology

At present, the hot extrusion method is the main method for producing metal matrix composite wire blanks. It has the advantages of high production efficiency and is suitable for large-scale batch production. However, from the actual situation of production, the hot extrusion method produces metal matrix composite wire blanks The yield of metal matrix composite wire is low and the cost of extrusion processing is high, resulting in high product cost. It is difficult to adapt to large-scale batch production by using other methods to prepare metal matrix composite wire blanks. Therefore, increasing the yield of metal matrix composite wire blanks is to reduce The main way in which its products cost

[0004] The metal matrix composite wire billet prepared by hot extrusion is subject to friction between the original billet and the extrusion cylinder, resulting in inconsistent flow rates of the metal material from the outside to the inside on the same section, and at the same time, the strength difference of different metal materials at the same temperature causes the metal material The resistance to deformation is different, which exacerbates the inconsistency of the flow of inner and outer metal materials, and finally leads to the composite ratio of the two metal materials at the tail end of the metal matrix composite wire blank not meeting the requirements and being cut off

Affected by complicated factors such as extrusion cost, difference in fluidity of metal materials, and extrusion process, the yield of metal matrix composite wire blanks is about 50%. The low yield leads to high prices of finished products, which seriously hinders this type of product. industrial application prospects

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