Preparing method of ultra-wide aluminum alloy thin plate based on rapid set powder metallurgy high-silicon aluminum alloy

Abstract

The invention provides a method for preparing an ultra-wide aluminum alloy thin plate based on rapid solidification powder metallurgy high-silicon aluminum alloy, comprising the following steps: putting high-silicon aluminum alloy powder into a sheath, performing vacuum degassing, heating, heat preservation and vacuuming respectively , and then seal the sheath and heat it for heat preservation. After the heat is completely uniform, perform peeling and hot extrusion to obtain a high-silicon aluminum alloy rod; the high-silicon aluminum alloy rod is machined to remove the outer aluminum sheath, solid solution, and heated Aging treatment to obtain high-silicon aluminum alloy; after heating high-silicon aluminum alloy, punching, reaming, elongation, ring rolling, multi-pass temperature-strength thinning and spinning, and intermediate annealing treatment, multi-pass Cold force thinning and spinning to obtain a tube billet; finally, after polishing, solution treatment and aging treatment, it is cut and flattened into an ultra-wide aluminum alloy sheet based on rapid solidification powder metallurgy high-silicon aluminum alloy. The high-silicon aluminum alloy material prepared by the invention has fine and uniform structure, ultra-wide width, simple preparation method and low cost.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy materials, and in particular relates to a method for preparing an ultra-wide aluminum alloy sheet based on rapid solidification powder metallurgy high-silicon aluminum alloy. Background technique [0002] Aluminum alloy has low density, high specific strength, good corrosion resistance, good processing and forming performance, good welding performance, small elastic modulus, easy recycling, no low temperature brittleness, and non-magnetic, so it is used in automobiles, ships, aerospace, nuclear energy, It is widely used in petrochemical and other fields. The manufacture of large aluminum alloy curved surface components is often a difficult problem in the manufacturing industry, but aluminum alloy large curved surface components are indispensable basic parts for the lightweight development of high-performance equipment. [0003] At present, large-scale aluminum alloy curved surface componen...

AI Technical Summary

Problems solved by technology

There are residual stresses in large aluminum alloy curved surface components prepared by welding and weld seams, which will significantly reduce the consistency and reliability of products, shorten the service life of products, and then affect the quality of large aluminum alloy curved surface components and even equipment, especially in the production of 3 The preparation method of wide aluminum alloy sheet over 1 meter is more difficult

[0004] Chinese patent CN 104289518A discloses a wide-width aluminum and aluminum alloy plate rolling method. The original ingot or slab whose width is smaller than the finished product is moved along the original ingot or slab through the ingot steering device. The self-axis rotates 0-90°, and the finished medium-thick plate with a width larger than the original ingot or slab is obtained through cross-rolling or cross-rolling. This preparation method requires large-scale rolling equipment and a huge investment

[0005] High-silicon aluminum alloy has the advantages of small specific gravity, light weight, good thermal conductivity, low thermal collision coefficient, good volume stability, good wear resistance and corrosion resistance, and certain high-temperature strength. The activity is very high, and a layer of oxide film will be formed on the surface during rapid solidification, which will hinder the interdiffusion of alloying elements during the densification process and make it difficult to form metallurgical bonds. There are not many studies on ultra-wide sheets