High-strength aluminum alloy subjected to carbonitride complex treatment and preparation method thereof

Abstract

The invention discloses a high-strength aluminum alloy subjected to carbonitride complex treatment and a preparation method thereof. The alloy comprises the following components in percentage by weight: 2.0-3.2 percent of Cu, less than or equal to 0.2 percent of Mn, 0.2-0.5 percent of Mg, less than or equal to 0.01 percent of Cr, less than or equal to 0.01 percent of Ni, less than or equal to 0.1 percent of Zn, less than or equal to 0.15 percent of Ti, less than or equal to 0.5 percent of Si, less than or equal to 0.5 percent of Fe, and the balance of Al and inevitable trace impurities, wherein the carbonitride MX(C,N)Y is 0.05-2.5 percent of total mass of the furnace burden. The aluminum alloy has the characteristics of high strength and good casting performance.

Description

technical field [0001] The invention relates to an aluminum alloy material and a high-quality treatment method thereof, in particular to a high-strength aluminum alloy treated with carbonitride compound and a preparation method thereof. Background technique [0002] Aluminum alloys for deep processing often need to be first cast into large ingots, such as flat ingots, round bars, etc., and then processed into various finished products by means of rolling, extrusion, forging, etc. These processes are basically related to heat treatment. Combined, if the final product can be used directly, it will also go through operations such as segmentation, surface processing, and passivation treatment. These processing methods require that the aluminum alloy material itself has good deep processing performance, including casting performance, pressure processing deformation performance, heat treatment strengthening performance, corrosion resistance performance, fatigue damage resistance p...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to add metal carbonitride M x (C,N) y , so that it is partially dissolved in the melt, providing atomic alloy elements M, C, and N elements, resulting in a variety of atomic metamorphic elements, and at the same time, some carbonitrides still exist in the form of compounds as interstitial strengthening phases; in the atomic state With the support of the combined action of interstitial phase and rapid and uniform distribution, it can overcome the lack of performance of aluminum alloy, improve its strength, toughness, formability and hardenability, and provide high-end base material for efficient deep processing

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