High-strength high-conductivity copper rod and preparation method thereof

Abstract

The invention relates to the technical field of copper rod materials, and particularly discloses a high-strength high-conductivity copper rod and a preparation method thereof. The copper rod comprises, by weight, 0.08-0.37% of chromium; 0.05 to 0.25 percent of nickel; 0.10 to 0.26 percent of aluminum; 0.18 to 0.38 percent of molybdenum; 0.18 to 0.35 percent of graphene; 0.20% to 0.50% of phosphorus; 0.20% to 0.50% of boron; and the balance copper. The method comprises the following steps that copper is placed in an inert atmosphere, high-temperature smelting is conducted till the copper is completely melted, and then heat preservation is conducted for 1 h; after pressurization is conducted to 2-2.3 standard atmospheric pressure, aluminum, nickel, chromium and molybdenum are sequentially added, heat preservation is conducted for 2 h after complete melting, vacuumizing is conducted to 0.4-0.5 standard atmospheric pressure, heat preservation is conducted for 2 h, and then graphene, phosphorus and boron are sequentially added; after complete melting, the mixture is injected into a casting mold and cooled, and a cast ingot is obtained; and the cast ingot is placed in an inert atmosphere, the temperature is raised to 500-800 DEG C, repeated stretching and calendering are conducted for 30-50 times, the temperature is lowered to 200-300 DEG C at the rate of 5 DEG C / min, and a copper rod is obtained through drawing. The copper rod can be used for electric conduction and has the advantages of being high in strength and good in conductivity.

Description

technical field [0001] The present application relates to the technical field of copper rod materials, more specifically, it relates to a high-strength and high-conductivity copper rod and a preparation method thereof. Background technique [0002] Copper is one of the earliest metals used by humans. As early as prehistoric times, people began to mine open-pit copper mines and used the obtained copper to make weapons, tools and other utensils. The use of copper had a profound impact on the progress of early human civilization. Copper is a The content of copper in the earth's crust is about 0.01%. In individual copper deposits, the content of copper can reach 3-5%. Most of the copper in nature exists in the form of compounds. Pure copper is relatively soft, its surface is red-orange with metallic luster when it is just cut, and its single substance is purple-red, with good ductility, high thermal conductivity and electrical conductivity, so it is the most commonly used materi...

AI Technical Summary

Problems solved by technology

However, when used in some precision instruments and equipment, copper rods are required to have low resistivity and high conductivity, which requires increasing the content of copper in copper rods. However, when the copper content increases, the strength of copper rods will decrease.

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