Continuously-cast crystallizer copper liner

Abstract

The invention discloses a continuously-cast crystallizer copper liner, which is prepared by a method comprising: preparing copper-aluminum alloy powder with an aluminum content of 0.03 to 0.6 weight percent, wherein the grain size of the copper-aluminum alloy powder is less than 150mum and the grain size of over 50 weight percent of powder is less than 74mum; filling the copper-aluminum alloy powder in an oxygen supply furnace, supply oxygen in a molar ratio of the oxygen to the aluminum in the copper and aluminum alloy of 3:2 to 6:2, and heating the copper-aluminum alloy powder to 100 to 300 DEG C to perform reaction for 3 to 30 hours; preparing dispersion copper powder ingot blanks; extruding the ingot blanks at 700 to 1,000 DEG C to a nearly formed pipe; drawing the extruded pipe blank by required specifications; and plating the surface of the drawn pipe blank. The copper alloy liner of the invention has the advantages that: casting efficiency can be improved greatly; the casting drawing speed can be improved by 1.5 to 2 times compared with the original drawing speed; the service life of the crystallizer copper pipe is improved greatly; and the productivity of the crystallizer is 1.5 to 3 times that of the traditional crystallizer.

Description

technical field [0001] The invention relates to a continuous casting technology, in particular to a copper alloy inner lining of a continuous casting crystallizer. Background technique [0002] Continuous casting is currently the most commonly used method in the production of steel billets, copper billets, and aluminum billets. Mold is the core component in continuous casting production, usually composed of copper alloy lining and cooling water jacket. Its purpose is to shape the poured metal liquid, transfer the heat of the metal liquid, make the metal liquid cool and solidify, and form a solidified shell of sufficient thickness outside the liquid. In order to ensure that the molten metal will not leak when the ingot is pulled out of the mold under the action of the tractor. The reliability of its operation directly affects the productivity of continuous casting and the quality of slab. [0003] One of the functions of the copper lining of the mold is to transfer the hea...

AI Technical Summary

Problems solved by technology

For example: the United States announced the Corson copper alloy without beryllium in the US1658186 patent in February 1979. The contradiction between the mechanical properties and electrical conductivity of this copper-nickel-silicon series alloy is prominent, and it is not suitable for continuous casting crystallizer materials.

Japan's Zhao 59-37340 patent announced a nickel-silicon-chromium-copper alloy, which uses a secondary aging method to make its performance meet the minimum requirements for hardness and electrical conductivity, but the patent does not involve softening temperature, thermal expansion coefficient, elastic modulus It is impossible to confirm that the material can meet the requirements of making continuous casting crystallizer materials.