Aluminum alloy for subway station ceiling and preparing method of aluminum alloy

Abstract

The invention relates to an aluminum alloy for a subway station ceiling and a preparing method of the aluminum alloy. The aluminum alloy is characterized by comprising chemical components, including by mass percent, 0.45% to 0.6% of Mg, 0.3% to 0.5% of Si, 0.1% to 0.3% of Mn, 0.1% to 0.2% of Cr, 0.1% to 0.3% of Zr, 0.1% to 0.3% of Hf, 0.05% to 0.2% of Ta, 0.05% to 0.15% of Cu, not larger than 0.05% of Zn, not larger than 0.20% of Fe, not larger than 0.05% of Ti, and the balance Al, wherein the single content of other impurity elements is not larger than 0.05%, and the total content of other impurity elements is not larger than 0.15%. The aluminum alloy is obtained through the preparing method of smelting, refining, casting and homogenizing. Through optimizing of alloy components, adjustment is carried out, the trace of Zr, Hf and Ta is added, and the strength, the heat dissipation, corrosion resistance, humidity resistance, fatigue resistance, static electricity resistance, recrystallization resistance capacity and breaking resistance performance of the aluminum alloy can be obviously improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to an aluminum alloy suitable for a suspended ceiling of a subway station and a preparation method thereof. Background technique [0002] The subway is an independent rail transit system. Its normal operation is not affected by the congestion of the ground roads, and it can transport passengers to their destinations quickly, safely and comfortably. The subway is the mainstream and direction of modern urban traffic. It has large traffic volume, fast speed, little interference, and low energy consumption. It is known as the main artery of a modern city. It is a demonstration of national strength and technological level, and it is the most effective way to solve the traffic tension in big cities. [0003] At present, the ceilings of subway stations mainly use gypsum boards, mineral wool boards, PVC, aluminum gussets and soft ceilings. The first generation of ceiling...

AI Technical Summary

Problems solved by technology

The existence of non-metallic inclusions such as oxides will destroy the continuity of the aluminum alloy matrix, reduce the plasticity, toughness, fatigue resistance and corrosion resistance of the aluminum alloy, and make the process performance and surface quality of the aluminum alloy worse.