High-permeability magnetic soft-contact two-stage copper alloy crystallizer and its preparation and application

Abstract

A highly permeable magnetic soft contact two-stage copper alloy crystallizer and its preparation and application belong to the field of electromagnetic metallurgical equipment manufacturing. The composition and mass percentage of the copper alloy used in the crystallizer are: Al<0.5%, Mn 31% to 33%, Ti<0.5%, Si<0.5%, and the balance is Cu. The crystallizer includes the upper half of the crystallizer made of the above-mentioned copper alloy, and the lower half of the crystallizer made of pure copper. The connection between the upper half of the crystallizer and the lower half of the crystallizer is pure copper TIG welded, and the welding method is open V. large groove to ensure welding penetration and sufficient strength at the weld joint; an electromagnetic induction coil is surrounded on the outside of the upper half of the obtained high-permeability magnetic soft-contact two-stage copper alloy crystallizer to provide soft-contact electromagnetic force, giving The optimal power supply operating parameters provide guidance for optimizing production; the cooling effect of the crystallizer is equivalent to that of a traditional pure copper crystallizer, and can meet the inherent properties of the crystallizer to promote the initial solidification of molten steel.

Description

technical field [0001] The invention relates to the field of electromagnetic metallurgical equipment manufacturing, in particular to a high-permeability magnetic soft-contact two-stage copper alloy crystallizer and its preparation and application. Background technique [0002] The surface defects produced in the continuous casting process of steel affect the quality of the slab. The root cause of this surface defect lies in the vibration marks and friction caused by the contact between the slab and the wall of the mold during the casting process. For cast slab products, it is usually necessary to undergo surface grinding before continuing to roll. Due to the contact between molten steel and the inner wall of the crystallizer, the surface grinding rate of steel is generally about 3-5%. If the surface vibration marks caused by the demoulding process can be eliminated, steel with smooth surface can be produced without grinding. , will greatly improve the economic benefits of t...

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Problems solved by technology

[0006] The invention provides a high-permeability soft-contact two-stage copper alloy crystallizer and its preparation and application. The method is based on the principle of "more quantity and less element". The soft contact electromagnetic extrusion force has developed a copper alloy with higher magnetic permeability. The magnetic permeability of the new high-permeability copper alloy is 4 times that of traditional pure copper materials; in view of the problem of insufficient joint strength at the mold weld, the The welding groove angle of the upper half and the lower half of the crystallizer is specially designed to ensure that the joint of the weld has sufficient strength; and on the basis of developing a high-permeability magnetic two-stage seamless soft-contact mold The optimal power supply parameters of the new two-stage crystallizer are obtained, and guidance is provided for further optimization of production; the cooling effect of the new two-stage crystallizer is preliminarily inspected, and the cooling effect has not deteriorated compared with the traditional pure copper crystallizer , which can meet the inherent properties of the mold to promote the initial solidification of molten steel

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