Rare earth aluminum alloy material and preparation method thereof

Abstract

On one hand, the invention provides a rare earth aluminum alloy material comprising the following components by mass: 6%-8% of Si, 1.5%-4.5% of Cu, 0.2%-0.5% of Mg, 0.3%-0.8% of Mn, 0.2%-0.5% of Re, 0.1%-0.2% of Ti, 0.01%-0.05% of Sr and 80%-89% of Al; the Re is mischmetal containing Ce and La, and the Ti, Si, Ce and La rare earth elements are introduced into aluminum alloy; the castability of thealuminum alloy is improved effectively, and the freezing range and dendrite arm spacing of the alloy are reduced; the rare earth aluminum alloy material is higher in strength and plasticity; the component requirements of the rare earth aluminum alloy material are lower, and high purity Al ingots and expensive Zr, V and Y alloys are not required; the production cost is low, and the rare earth aluminum alloy material is high in industrial value. On the other hand, the invention provides a preparation method of the rare earth aluminum alloy material, and an indirect extrusion casting process isadopted; and the industrial production is achieved, and the preparation method has huge development potential in the fields of lightweight automobiles, intelligent robots, aerospace and the like.

Description

technical field [0001] The invention belongs to the technical field of metal alloys, and in particular relates to a rare earth aluminum alloy material and a preparation method thereof. Background technique [0002] Aluminum alloy is a kind of non-ferrous metal structural material. It has the advantages of low density, high strength, good plasticity, excellent electrical and thermal conductivity, and corrosion resistance. It is widely used in aerospace, automobile manufacturing, 3C products, ships, and chemical industries. With the development trend of lightweight, the demand for aluminum alloy materials is increasing; in the field of automobile manufacturing, the use of aluminum alloy materials for the overall body and accessories is the development direction of automobile lightweight, so the mechanical properties and casting of aluminum alloy materials Performance puts forward higher requirements. [0003] High-strength and tough aluminum alloy materials are mainly two typ...

AI Technical Summary

Problems solved by technology

Deformed aluminum alloy reduces casting defects by means of pressure processing, and at the same time refines the grains through shear strain and recrystallization during the deformation process, which improves the density of the material and has the advantages of high strength and good toughness, but the deformed aluminum alloy High requirements on equipment and tooling molds, cumbersome preparation process, long production cycle and high production cost

Compared with wrought aluminum alloys, cast aluminum alloys have the advantages of short procedures and high production efficiency, especially in the production of castings with complex structures. However, cast aluminum alloys have strict requirements on alloy properties and must have good fluidity and solidification properties. Shrinkage, otherwise the cast product is difficult to form or has defects that are difficult to eliminate

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