Preparation method of copper and copper alloy oval tube

Abstract

The invention discloses a preparation method of a copper and copper alloy oval tube, which enables standard cathode copper to serve as a raw material to conduct smelting, ingot casting and saw cutting to obtain extrusion short ingot blanks of T2 phi 260mmX520mm or T2 phi 310mmX600mm. The extrusion short ingot blanks are heated on an induction heating-resistance soaking pit furnace, the heating temperature is 750-880 DEG C, the preheating temperature of a die is set to be 350-380 DEG C, and water sealing extrusion is carried out on the ingot blanks. The head and the tail of an extrusion tube blank are cut, acid washing, water scrubbing, alkali washing, hot water washing and rolling are carried out, and finally sizing saw cutting, head manufacturing and vertical bar stretching are carried out on the extrusion tube blank. Copper and aluminum composite busbars are produced by using the prefabricated oval tube, a large amount of the nonferrous metal is saved, and production cost is reduced. A molding stretching process guarantees that the upper big face and the lower big face of the oval tube are free of inside sinking phenomena.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal pressure processing, and in particular relates to a preparation method of copper and copper alloy oval tubes. Background technique [0002] Copper and aluminum are currently the most widely used metal conductor materials. my country's copper resources are scarce, and 85% of domestic copper demand depends on imports. Although my country is rich in bauxite resources, most of the bauxite is a high-silicon, hard aluminum-type mineral that is difficult to extract. At present, more than 60% of the alumina used in domestic aluminum smelting relies on imports. Copper-aluminum composite bar is a low-cost and energy-saving new conductor material with aluminum as the core and copper as the outer layer. It is a conductor that replaces electrical copper bars. In the copper-aluminum composite row, copper accounts for 45% and aluminum accounts for 55%. It combines the strong oxidation resistance and lo...

AI Technical Summary

Problems solved by technology

When the existing process produces elliptical pipes, the final forming and drawing process is generally carried out by the air drawing process, and it is difficult to ensure that the upper and lower surfaces of the elliptical pipe are not sunken inward during the air drawing process. The forming and drawing process is a intractable problem

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