Casting-milling process method for manufacturing copper and copper alloy band

Abstract

The invention relates to a processing method for copper and copper alloy strip, which pertains to sheet metal strip casting, heat-rolling and machining technology. Specifically, the invention adopts continuous casting, hot rolling, thermomechanical treatment and machining principle and subjects band of horizontal continuous casting and downward continuous casting to heat preservation and samming, rapidly cooling after directly hot-rolling, on-line surface milling and rolling to built-up coil. Rolling is operated under the condition of exceeding recrystallization temperature and nitrogen protection. In the rolling, dynamic recrystallization of band structure takes place. The invention provides photo-quality and high-accuracy blank for cold rolling of end product.

Description

Technical field: [0001] The invention relates to a metal strip processing method, in particular to a casting and rolling processing method for manufacturing copper and copper alloy strips. Background technique: [0002] The manufacturing methods of copper and copper alloy strips in the prior art mainly include semi-continuous casting and cold-rolling method and ingot hot-rolling method, but the traditional two methods all have many processes, low yield and low strip manufacturing efficiency. High cost and so on. The first semi-continuous casting and cold-rolling method is to send the semi-continuous casting strip billet into a two-roll or four-roll mill for cold rolling after double-sided milling. Since the rolling is carried out at the recrystallization temperature, the rolling Defects such as poor plastic deformation ability of the as-cast structure and loose structure caused by a large number of grain fractures during rolling cannot be eliminated in the final heat treatm...

AI Technical Summary

Problems solved by technology

[0002] The manufacturing methods of copper and copper alloy strips in the prior art mainly include semi-continuous casting and cold-rolling method and ingot hot-rolling method, but the traditional two methods all have many processes, low yield and low strip manufacturing efficiency. high cost etc.

The first semi-continuous casting and cold-rolling method is to send the semi-continuous casting strip billet into a two-roll or four-roll mill for cold rolling after double-sided milling. Since the rolling is carried out at the recrystallization temperature, the rolling Defects such as poor plastic deformation ability of the as-cast structure and loose structure caused by a large number of grain fractures during rolling cannot be eliminated in the final heat treatment. Therefore, the strip produced by this method can only be used for general purpose

The application of the second ingot hot rolling method solves the problems of the first method. It is to heat the semi-continuous casting ingot and send it to a two-roll or four-roll mill for hot rolling. If it is carried out above the recrystallization temperature, dynamic recrystallization will occur in the structure of the copper strip billet during rolling. After multi-pass rolling, it will be coiled and cooled, and then uncoiling, straightening, double-sided milling, and coiling will be performed before cold rolling. It can be used for cold-rolled billets; this kind of hot rolling is carried out in the air. During the rolling process, a lot of oxides are produced on the surface of the billet. After repeated rolling, some oxides are inevitably rolled into the cross-section of the billet. It has some influence on its performance; the most important thing is that this manufacturing method has many procedures, high equipment investment, low yield, low efficiency, and high manufacturing cost

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