Novel copper and copper alloy plate belt electromagnetism assistant casting method and device

Abstract

The invention relates to a novel copper and copper alloy plate belt electromagnetic auxiliary casting method and a device thereof; a fixed magnetic field generation device is arranged at the horizontal continuous casting crystallizer position of the copper and copper alloy plate slab; an external magnetic field has the intensity of 50-2000 Gauss; furthermore, a current is transversely applied between two side walls of the transverse side of a graphite crystallizer with the current intensity of 1-2000A; the current forms a loop transversely; the current loop is vertical to the axial direction of the plate belt; the magnetic mixing direction can be changed by changing the direction of the magnetic field or the current direction so as to form forcible mixing along the identical direction or reverse direction to the plate slab direction; the mixing can be axial continuous or intermittent mixing so as to lead the melt at the front edge of the crystallization bears a Lorentz force and forcibly mixed, thus prompting the solidified area to form a plurality of free crystal nucleuses and being beneficial to generating equiaxed grain; therefore, segregation and negative segregation is restrained, the casting tissue is fined, the plate slab surface quality and the processing yield of the plate belt are improved, the continuous production of bronze plate slab with high content of Sn is easy to realize, and the homogenous processing technology is simplified.

Description

technical field

[0001] The invention relates to a novel copper and copper alloy strip electromagnetic assisted casting method and device, belonging to the technical field of non-ferrous metal processing. Background technique

[0002] The traditional copper alloy strip adopts the semi-continuous casting or full continuous casting process to prepare the ingot, and then prepares the strip product through hot rolling blanking, cold rolling and other processes. Since the 1980s, the domestic copper processing industry began to adopt horizontal continuous casting technology to prepare strip blanks with a thickness of 14-18mm. The width of the slab is usually between 300-650mm. In theory, the horizontal continuous casting process can obtain blanks with any large coil weight. , The slab undergoes decoiling, face milling, cold rolling and other processes to prepare strip products of various thickness specifications. Although this technology cannot fully replace the block-type copper ...

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