A large-width copper plate strip continuous casting-continuous extrusion short process forming process

Abstract

This invention relates to a short-process continuous casting-extrusion forming technology for wide copper strip, belonging to the field of metal processing technology. High-purity cathode copper is preheated and dried before being melted in a smelting apparatus. Charcoal and graphite flakes are used to cover the surface of the molten copper, followed by online degassing, deoxidation, and stirring. A traction unit is used to draw copper rods, which are then extruded between extrusion and compaction rollers. A four-roll mill is used for rolling. After annealing, the copper strip is first cleaned and passivated, then sprayed with a lanthanum(III)-silane-benzimidazole lubricant solution, followed by drying. The strip is then slit to obtain wide copper strips. The lanthanum(III)-silane-benzimidazole lubricant is prepared from vinyltriethoxysilane, deionized water, ethanol, benzimidazole, and lanthanum(III) nitrate hexahydrate. The copper strip prepared by this invention has high purity, low oxygen content, high conductivity, and excellent mechanical properties, meeting the technical requirements of high-end fields for high-purity, high-conductivity, oxygen-free copper strips.

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