High-strength corrosion-resistant aluminum alloy for ships and preparation method thereof

Abstract

The invention relates to the technical field of aluminum alloys, and discloses a high-strength corrosion-resistant aluminum alloy for ships and a preparation method thereof.The high-strength corrosion-resistant aluminum alloy comprises an aluminum alloy body, and the aluminum alloy body comprises an aluminum alloy and a reinforcing agent; the aluminum alloy comprises aluminum (Al), silicon (Si), copper (Cu), magnesium (Mg), zinc (Zn), titanium (Ti), nickel (Ni) and scandium (Sc). The enhancer comprises manganese Mn, iron Fe and Na salt. In the invention, grain growth is hindered, so that the alloy is always kept in a fine grain state. Scandium is high in dispersity, homogeneous nucleation is achieved, the strong dispersion strengthening effect is achieved, the recrystallization temperature of the aluminum alloy can be remarkably improved, scandium can remarkably improve the corrosion resistance, strength, weldability and the like of the aluminum alloy, and due to the fact that an Al3 (Sc and Zr) composite phase exists in the aluminum alloy added with the scandium element, grains can be refined, precipitation of a beta phase (Mg5Al8) in the alloy can be effectively restrained, and the aluminum alloy can be used for preparing the aluminum alloy. And the beta phase is discontinuously distributed in an alloy matrix, so that the corrosion sensitivity of the alloy is reduced, and the effect of improving the corrosion resistance of the aluminum alloy is achieved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a high-strength corrosion-resistant aluminum alloy for ships and a preparation method thereof. Background technique [0002] Ship is the general term for all kinds of ships. A ship is a means of transportation that can sail or berth in waters for transportation or operation, and has different technical performance, equipment and structural forms according to different requirements for use. A ship is a man-made means of transportation that primarily operates in geographical waters. In addition, civilian ships are generally called ships, military ships are called ships, and small ships are called boats or boats, which are collectively called ships or boats. The interior mainly includes accommodation space, support structure and drainage structure, and has a propulsion system that utilizes external or self-contained energy. The shape is generally a streamlined envelope th...

AI Technical Summary

Problems solved by technology

[0003] The existing aluminum alloys on the market, because aluminum and aluminum alloys are widely used in transportation because of their excellent physical and chemical properties, they can be used in ships instead of steel to reduce the weight of components by more than 50%, but because ships are always floating on the water , the aluminum alloy will react with water, resulting in a lower service life of the aluminum alloy and affecting the use of the ship