Thermal treatment process for erbium-containing aluminum-magnesium-manganese wrought aluminium alloy

Abstract

The thermal treatment process for an aluminum-magnesium-manganese wrought aluminum alloy containing erbium belongs to the filed of metal alloys. The existing aluminum alloy thermal treatment process has the problems of strength reducing, corrosion resisting performance reducing after long term use, etc. The invention aims at providing the thermal treatment process for an aluminum-magnesium-manganese cold-rolled sheet containing erbium, which is realized by homogenizing annealing, hot rolling, cold rolling, stabilizing annealing and other process steps, wherein the stabilizing annealing process comprises the steps that, a cold-rolled sheet is annealed at the temperature of 100-400 DEG C and insulated for 1-48h; the annealing temperature and the insulating time are preferably 125-250 DEG C and 1-8h respectively. The thermal treatment process of the invention ensures the alloy to acquire excellent corrosion resisting performance under the condition that the high plasticity of the aluminum-magnesium-manganese cold-rolled sheet containing erbium is kept at a higher level; the treated alloy can be used for a long time with basically constant performance, and the service range of the alloy is wide.

Description

technical field

[0001] The invention relates to a heat treatment process of aluminum-magnesium-manganese series deformed aluminum alloys, in particular to a heat treatment process using stabilization annealing for deformed aluminum alloy materials containing erbium. Background technique

[0002] Aluminum-magnesium alloys have excellent plasticity, corrosion resistance and weldability, and can be widely used in aviation, spaceflight, transportation and other fields. However, due to the low strength of this series of alloys, its practical application is limited. This series of alloys is an aluminum alloy that cannot be strengthened by heat treatment, and methods such as work hardening and microalloying are generally used to improve its comprehensive properties. Due to the limited improvement of alloy strength by work hardening, the method of microalloying is generally concerned at present. Studies in recent years have shown that the rare earth element erbium (Er) is an effec...

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