Preparation method of composite coating on crystallizer copper plate surface

Abstract

The invention discloses a preparation method of a composite coating on the surface of a crystallizer copper plate. The preparation method is characterized in that two anode plates are arranged in a plating tank; a slurry feeding pipe is arranged in a middle part; a copper plate is horizontally arranged below the two anode plates and can horizontally and reciprocatingly move in the tank; the copper plate is electroplated below the first anode plate to obtain a pure nickel coating and then moves below the second anode plate, meanwhile, nano ceramic particle slurry wet and dispersed by an electroplate liquid is uniformly scattered on the surface of the copper plate by the slurry feeding pipe, the nano ceramic particles are uniformly inlaid on the pure nickel coating surface of the copper plate by the second anode, then the copper plate moves below the first anode plate, the nano ceramic particles inlaid on the pure nickel coating surface are reinforced, and inlay and reinforcement are carried out repeatedly until the coating meets the technological requirements. Through the preparation method, the nickel composite coating on the surface of the crystallizer copper plate is obtained. The method disclosed herein is conducive to improvement of high temperature resistance, wear resistance and corrosion resistance of the crystallizer copper plate, and is conducive to improvement of steel pouring quantity of crystallizer continues casting, and prolonging of a service life of the crystallizer.

Description

technical field [0001] The invention relates to a method for preparing a composite coating on the surface of a crystallizer copper plate. Background technique [0002] As the core device of the continuous casting production of steel, the quality of the crystallizer directly affects the quality of the billet and the operating efficiency of the continuous casting machine. Since the molten steel is directly cooled by the surface of the mold to form a slab, the copper plate of the mold is required to have the characteristics of good heat transfer, high temperature resistance, wear resistance, and corrosion resistance. Steel throughput refers to the amount of steel material passing through the mold, which is an important indicator to reflect the service life of the mold, and also a comprehensive reflection of the production control level of continuous casting. At present, most of the crystallizers use copper plates containing trace amounts of chromium and zirconium. In the earli...

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Problems solved by technology

[0003] However, at present, the coatings actually applied to the copper plate of the continuous casting crystallizer are limited to the single and binary coatings such as Cr, Ni, Ni-Co, Ni-Fe, and Co-Ni. The corrosion performance is not ideal; while the multi-element alloy and composite coating are only in the experimental research stage, and there are almost no applications in actual industrial production.

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