Method for preparing high-entropy alloy particle reinforced aluminum matrix composite material through electromagnetic stirring casting

Abstract

The invention discloses a method for preparing a high-entropy alloy particle reinforced aluminum matrix composite material through electromagnetic stirring casting, and relates to the technical fieldof high-performance metal material manufacturing. The method comprises the steps of material preparation, mold drying, charging, furnace burden melting, molten aluminum refining, high-entropy alloy particle adding, casting and demolding. The material preparation comprises the following steps that 1, blocky aluminum ingots and intermediate alloy ingots are prepared; 2, the blocky aluminum ingots and the intermediate alloy ingots are cleaned, an oxide layer is removed, and drying is carried out; 3, the dried raw materials are cut into small blocks, and the small blocks are weighed by using an electronic balance for later use; 4, high-entropy alloy powder is prepared, and the component of the high-entropy alloy powder is Al1.5CrCoNiFe; and 5, the high-entropy alloy powder is fully dried and then weighed for use. An aluminum alloy melt in a casting mold is stirred through an electromagnetic field, the electromagnetic field belongs to a non-contact external energy field, crystalline grainscan be effectively refined, and the distribution uniformity of reinforced particles in a material is improved.

Description

technical field [0001] The invention belongs to the technical field of manufacturing high-performance metal materials, and in particular relates to a method for preparing high-entropy alloy particle-reinforced aluminum-based composite materials by electromagnetic stirring casting. Background technique [0002] Aluminum matrix composites have developed rapidly in recent years because of their low density, high mechanical strength and fatigue resistance, good heat resistance, corrosion resistance, and good dimensional stability. There are huge application prospects in transportation, waterway transportation, electronic appliances and other fields. The performance of aluminum matrix composites is generally determined by the interface bonding state between the reinforcement and the matrix, the characteristics of the matrix and the reinforcement itself, and the distribution of the reinforcement in the matrix. Common reinforcing particle materials include SiC, Al2O3, BN, etc., int...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing high-entropy alloy particle-reinforced aluminum-matrix composite material by electromagnetic stirring casting, so as to solve the existing problems: Yang Shaofeng and Zhu Dezhi disclose a method of high-entropy alloy particle-reinforced aluminum-matrix composite material Powder synthesis process, but this type of method has certain limitations in the preparation of large-sized blocks; in this regard, liquid synthesis method has great advantages, but this method needs to solve the problem of high-entropy alloy particle self-agglomeration, Zhu Dezhi disclosed A stirring casting preparation process of aluminum-based high-entropy alloy composite materials was proposed, but this method uses mechanical stirring to directly destroy the oxide film on the surface of molten aluminum, which seriously affects the metallurgical quality of the prepared materials