A method of improving yield strength of copper wire

Abstract

The invention discloses a method for improving the yield strength of a copper wire. The method comprises the following processes: melting copper with an electric furnace; hot-rolling the smelted copper with a continuous casting and rolling machine; cooling the hot-rolled copper wire Finally, it is extruded with an extrusion molding machine; the extruded copper wire is then subjected to cold rolling and stretching treatment; the stretched copper wire is annealed through an annealing furnace; the annealed copper wire is then The stretching process is performed by a stretching machine. After the processing technology is processed, the internal stress of the copper wire can be effectively eliminated, and the yield strength of the wire can be improved. Under the premise of not changing the material composition and smelting process, the yield strength of the wire can be increased from the original 200-230MPa to 265MPa. , and can also reduce the surface hardness of the wire, wherein the annealing process is simple, easy to operate, low processing cost, and has a significant effect on improving the yield strength of the copper wire.

Description

technical field [0001] The invention relates to a processing method for wires, in particular to a method for improving the yield strength of wires. Background technique [0002] At present, the yield strength of commonly used copper wires is generally less than 260MPa. To increase the yield strength of the wires, the general method is to change the composition of the copper alloy, or change the smelting process of the copper alloy at the same time. Using the above measures to increase the yield strength of the copper wire leads to a problem that the resistivity of the copper wire will increase accordingly, the production process will be complicated, and the production cost will also increase. The most important thing is that after the resistivity of the copper wire increases, it will increase the consumption of electric energy, and at the same time, the heat generation of the copper wire will also increase. The aging speed of wires and corresponding equipment. Due to the i...

AI Technical Summary

Problems solved by technology

Using the above measures to improve the yield strength of the copper wire, the resulting problem is that the resistivity of the copper wire will increase accordingly, the production process will be complicated, and the production cost will also increase.

The most important thing is that after the resistivity of the copper wire increases, it will increase the consumption of electric energy, and at the same time, the heat generation of the copper wire will also increase. Aging speed of wires and corresponding equipment

Due to the internal stress generated inside the copper wire during cold rolling and other processing processes, and the surface hardness of the wire will be relatively hard, if the wire is directly painted on the surface and used, it will also cause deformation of the copper wire or distorted