Methods for preparing continuous casting crystallizer copper plate surface modified W-Cu alloy layer and application thereof

Abstract

The invention relates to methods for preparing a continuous casting crystallizer copper plate surface modified W-Cu alloy layer and the application thereof, and the W-Cu alloy layer is especially applicable to a steel and nonferrous metal continuous casting crystallizer copper plate modified layer. The modified layer comprises the components by weight percent: 30.0-70.0% of W, 23.0-69.65% of Cu, 0.1-2.0% of Ni, 0.05-2.0% of Ag and 0.2-3.0% of Co. The preparation methods comprise a. hot pressed sintering and b. infiltration method, wherein the hot pressed sintering is characterized by (1) evenly mixing the powder and hot pressed sintering for molding; (2) pouring molten copper on sintered W-Cu alloy or placing a copper plate on the W-Cu alloy, heating and leading copper to be molten and have infiltration together with the W-Cu alloy, and cooling and then obtaining the copper plate product provided with the W-Cu alloy modified layer; and the infiltration method is characterized by (1) evenly mixing the powder, cold pressing into infiltration framework and high temperature sintering; (2) pouring the molten copper on the W-Cu framework for infiltration or placing the copper plate on the W-Cu alloy framework, heating and leading copper to be molten and have infiltration together with the W-Cu alloy framework, and then cooling. The W-Cu alloy layer has the advantages of greatly improving the production efficiency of a crystallizer, solving the problem of electroplating pollution of the crystallizer copper plate and being a high-efficiency and environment-friendly crystallizer surface modification method.

Description

technical field [0001] The invention relates to a surface modification layer of a crystallizer copper plate, which is suitable for a crystallizer for continuous casting in the metallurgical industry, especially for a modified layer of a crystallizer copper plate for continuous casting of steel and nonferrous metals. Background technique [0002] Continuous casting is the abbreviation of continuous casting. Compared with traditional methods, continuous casting technology has significant advantages such as greatly improving metal yield and billet quality, and saving energy. [0003] The specific process of continuous casting (taking continuous steel casting as an example) is: molten steel continuously passes through the water-cooled crystallizer, condenses into a hard shell, and then is continuously pulled out from the outlet below the crystallizer, cooled by water spray, and then cut into billets after being completely solidified. crafting process. [0004] Since the 1980s,...

AI Technical Summary

Problems solved by technology

[0007] (1) The thermal conductivity of the coating is low, generally only 1 / 5 of the copper plate, which acts as a thermal resistance on the surface of the mold and reduces the cooling efficiency of molten steel;

[0008] (2) The thermal expansion coefficients of the coating and the copper plate are different, which can easily induce cracks between the coating and the copper plate, resulting in peeling off of the coating, so the service life of the electroplated copper plate of the crystallizer is generally not high, which directly affects the efficiency of continuous casting production

[0009] (3) The environmental hazards of electroplating production are relatively large, and many developed countries have transferred such industries to developing countries such as my country

[0010] The present invention is proposed in view of the current situation that the copper plate coating of the continuous casting crystallizer has short service life, low thermal efficiency, and great environmental hazards, which restrict the production efficiency of continuous casting.