Aluminum alloy with good toughness and difficulty of cracking for doors and windows

Abstract

The invention discloses an aluminum alloy with good toughness and difficulty of cracking for doors and windows. The aluminum alloy is characterized by consisting of the following elements in percentage by mass: 0.20-0.25% of chromium, 0.2-0.4% of titanium, 0.1-0.2% of cerium, 0.11-0.14% of yttrium, 0.15-0.17% of strontium, 0.2-0.25% of lead, 0.7-0.9% of copper, 1.1-1.3% of zinc, 1.0-1.3% of silicon, 0.20-0.22% of germanium, 0.15-0.25% of lithium, and the balance of aluminum and impurities. The added components of cerium, yttrium, zinc and the like can improve the corrosion resistance of the alloy, improve the low-temperature toughness and cracking property, the processing performance and the welding performance, enhance the quality of the aluminum alloy, and meanwhile meet the decoration requirement of buildings and the cost requirement of most of people.

Description

technical field [0001] The invention relates to the field of aluminum alloys, in particular to an aluminum alloy for doors and windows that has good toughness and is not easily broken. Background technique [0002] As the most typical lightweight material among metal materials, aluminum alloy has the advantages of low specific gravity, easy processing, and low cost, and has been widely used in both military and civilian applications. As aluminum alloy has the advantages of convenient maintenance, good decorative effect, and light weight, it is more and more widely used in doors and windows, but because it is used outdoors, it is often affected by weather such as wind, rain, and exposure, and the corrosion resistance of ordinary aluminum alloys is average. , the strength is not high enough, the low temperature toughness decreases, and the occurrence of easy fracture in winter, etc., so the aluminum alloy profiles with better performance and lower cost are needed. The present ...

AI Technical Summary

Problems solved by technology

As aluminum alloy has the advantages of convenient maintenance, good decorative effect, and light weight, it is more and more widely used in doors and windows, but because it is used outdoors, it is often affected by weather such as wind, rain, and exposure, and the corrosion resistance of ordinary aluminum alloys is average. , the strength is not high enough, the low temperature toughness decreases, and the occurrence of easy fracture in winter, etc., so the aluminum alloy profiles with better performance and lower cost are needed. The present invention can improve the resistance of the alloy by adding cerium, yttrium, zinc and other components to this situation. Corrosion ability, improve low temperature toughness, fracture, improve processing performance and welding performance, improve the quality of aluminum alloy