Aluminum alloy cast ingot and fluid core magnetic flow casting method for improving component uniformity of aluminum alloy cast ingot

Abstract

The invention relates to the technical field of aluminum alloy casting, and discloses a fluid core magnetic flow casting method for improving the component uniformity of an aluminum alloy cast ingot.The method comprises the following steps that one magnetic fluid generator is placed on each of two sides of a crystallizer correspondingly, and the magnetic fluid generators are started after a smelted aluminum melt enters the interior of the crystallizer; phase shifts of the frequency, current and waveform of low-frequency electromagnetic fields of six independent electric phases of the magneticfluid generators are adjusted through a front-end controller; and the flowing state of the aluminum melt is presented through calculating of a computational fluid dynamics three-dimensional model andmagneto fluid mechanics three-dimensional analysis. The invention further discloses an aluminum alloy cast ingot manufactured through the fluid core magnetic flow casting method for improving the component uniformity of the aluminum alloy cast ingot. According to the fluid core magnetic flow casting method for improving the component uniformity of the aluminum alloy cast ingot, the segregation rate of main component elements in the aluminum alloy casting process is reduced, the grain size of a cast ingot structure is reduced, the rejection rate of the cast ingot is reduced, the uniformity andmacrosegregation of the cast ingot structure are effectively improved, and flaws of products appearing in the machining processes of rolling, milling and the like can be remarkably reduced.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy melting and casting, in particular to an aluminum alloy casting ingot and a liquid core magnetic flow casting method for improving the uniformity of its composition. Background technique [0002] At present, as the high performance requirements of alloy products become more and more stringent, the control of chemical composition and microstructure uniformity of ingot processing materials becomes more and more important. At present, there are still many metallurgical quality problems in the 7000 series high-alloy aluminum alloy ingots produced in China. In the inspection of the ingot structure, it is found that there are problems such as coarse grains, microscopic porosity, oxidation inclusions, and segregation of main component elements. These problems make Subsequent processing of thick plates and forgings is prone to flaw detection and fracture oxide film, and the comprehensive reject rat...

AI Technical Summary

Problems solved by technology

However, as the casting speed decreases, the temperature field and stress field of the casting liquid-solid interface will differ greatly, and the tendency of casting cracking will increase. Moreover, with the increase of ingot size and width-thickness ratio, the forming control will be more difficult.