Cast-rolling mechanism for aluminum alloy plates

Abstract

The embodiment of the invention discloses a cast-rolling mechanism for aluminum alloy plates. The cast-rolling mechanism comprises a front box, a cast-rolling mouth, casting rollers and a pulse loop, wherein the front box is used for bearing aluminum alloy flux, the cast-rolling mouth is connected to a sluice in the lower part of the front box, the casting rollers are symmetrically arranged on and under the front end of the cast-rolling mouth, the aluminum alloy flux is cast and rolled for forming the aluminum alloy plates through the casting rollers, one electrode of the pulse loop is connected to the aluminum alloy flux, and the other electrode of the pulse loop is connected to the aluminum alloy plates. According to the cast-rolling mechanism for the aluminum alloy plates, low-temperature casting is adopted, and therefore more crystal nucleuses can be formed at the solidification front of a cast-rolling area, and grains can be refined; the pulse loop with one electrode connected to the aluminum alloy flux and the other electrode connected to the aluminum alloy plates is arranged additionally, and therefore the flux of aluminum alloy 7075 can be always subjected to the effect of pulsed magnetic force, the phenomenon that the flowing property is lowered because the crystal nucleuses grow up and get bridged can be prevented, the roundness degree of the crystal nucleuses can be improved, and the uniformity of alloy elements can be improved.

Description

technical field [0001] The invention relates to the field of aluminum alloy plate production, in particular to an aluminum alloy plate casting and rolling mechanism. Background technique [0002] 7075 aluminum alloy is an ultra-high-strength aluminum alloy, which is an indispensable structural material in the aviation field. The traditional method of producing 7075 alloy plate is hot rolling, which has many procedures and high cost. Due to the particularity of the process, the casting and rolling method has the advantages of simple process, short process, low investment cost, energy saving and environmental protection. If the casting-rolling method can be used instead of the traditional hot-rolling method to produce 7075 aluminum alloy plates, the cost will be greatly reduced, energy saving and emission reduction will be achieved, which will have very obvious economic value. However, due to the high content of total alloy elements in the 7075 alloy, severe central segregat...

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Problems solved by technology

However, due to the high content of total alloy elements in the 7075 alloy, severe central segregation is prone to occur during the casting and rolling process, and there are many unmelted eutectic phases in the slab, and coarse crystal phases are easily formed in the as-cast structure. It is easy to produce delamination, and it is difficult to produce qualified 7075 plates; so far, ordinary casting and rolling methods have not been used in the production of 7075 aluminum alloy plates

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